Tag Archives: UKPK

Advice, Folders, Review

INSTALLING THE TITECH HEINNIE® EXCLUSIVE SPYDERCO UKPK TITANIUM SCALES.

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Installing Titech titanium scales from Heinnie Haynes onto a Spyderco UKPK is less a mechanical operation than a quiet exercise in precision, patience, and restraint—something closer to watchmaking than simple knife maintenance. And I’m clumsy.
The UKPK, with its deceptively simple slipjoint construction, hides a strong and finely balanced backspring fork whose tension defines the entire character of the knife. Respecting that tension is the key to a successful transformation. And trust me, it asks for respect because it is strong !!

Begin by approaching the disassembly with intention rather than haste. A quality Torx driver is essential, not only to preserve the hardware but to maintain control over each movement. Remove the pocket clip screws first, then the body screws, and only then ease into the pivot. At this stage, the knife is still under spring tension, and it is important to keep a subtle, steady pressure on the handle as the scales begin to separate. The backspring should never be allowed to snap free; instead, it must be guided, almost persuaded, into release.

This moment defines whether the process remains controlled or becomes unnecessarily chaotic.

As the original FRN scales come away, the internal architecture of the UKPK reveals itself in a straightforward yet unforgiving layout: blade, backspring, stop pin, pivot barrel, and screws, all of which must be preserved and transferred. The most elegant way to proceed is to move components gradually, keeping their orientation intact, allowing the new titanium scale to receive them in a natural sequence rather than reconstructing everything from memory. The washers, often overlooked, are in fact central to the final action. They must sit perfectly flat on either side of the blade, aligned with the pivot, as even the slightest misplacement will translate into stiffness or uneven movement once assembled.
I have used gaffer tape to maintain the D Shape female screws in place while manipulating the scale.

Reassembly is where the transformation begins to take shape. One titanium scale becomes the foundation upon which the blade and spring are seated, their relationship re-established with careful alignment. The second scale closes the structure, and the pivot is introduced not as a point of tension but as a placeholder, tightened only enough to hold the system together.

Insert the blade carefully into the fork of the backspring, ensuring it seats naturally without forcing the geometry; from that moment onward, the entire operation shifts to the opposite end of the spring, whose tail must be guided with precision into the recessed channel of the titanium scale, where it locks into place and defines the tension of the mechanism.


The body screws follow, also left deliberately loose. At this stage, the knife should feel unresolved, almost unfinished, and that is precisely the intention.

The refinement comes next, and it is here that the distinction between an average installation and an exceptional one is made. The body screws should be brought to tension first, gradually and evenly, allowing the frame to settle without distorting the spring. Only then should the pivot be adjusted, and even then with the lightest touch, in minute increments. The temptation to over-tighten must be resisted entirely. On a slipjoint like the UKPK, excessive force does not create solidity; it creates imbalance, increasing spring pressure artificially and compromising the fluidity of the action. In extreme cases, it risks stressing the spring itself, which is the heart of the mechanism.
Keeping the pivot loose with a touch of threadlocker is exactly the right instinct; it allows the mechanism to settle into its natural alignment before you commit to final tension.

The final result: the UKPK gains a subtle weight, a cooler tactility, and a sense of structural integrity that the original FRN cannot provide.
I love the added heft—it enhances the feel while preserving the rustproof nature of the UKPK Salt.
t’s a rare upgrade where nothing essential is lost. Instead, everything is simply… tightened, deepened, and made more intentional.
And for around 57 euros, it feels like a genuine bargain.
Heinnie Haynes also offers brass and copper Titech scales, though they didn’t quite suit the spirit of my Spyderco UKPK Salt.
But if Sal Glesser ever releases a 52100 version of the UKPK, copper would suddenly make perfect sense. 🙂

Now my Spyderco UKPK Salt has developed a beautifully smooth action paired with a reassuringly strong mechanism. The mid-stop produces a crisp, satisfying clang that subtly signals quality. It’s a pleasure to handle, with a confidently positive open position that inspires trust every time.

Advice, Folders

“Part The Matters For Me” – Spyderco UKPK Salt Serrated vs UKPK Sprint SPY27 Plain Edge – Teeth vs Razor.

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I often come across very strong opinions when it comes to serrated versus plain edges. More often than not, users dismiss serrations outright—too ugly, too difficult to sharpen, ultimately useless, impossible to tune… usually without ever having truly put them to the test.

Consider this a brief attempt to set the record straight.

The Spydie UKPK Salt in Magnacut, here in its serrated form, is built for unforgiving environments : lightweight, corrosion-proof, and relentlessly efficient when conditions turn wet, fibrous, or hostile.

Facing it, the Spyderco UKPK Sprint Run in SPY27 with a plain edge embodies precision and control, offering a refined, razor-like cutting experience with effortless maintenance.

What do we got ? Two identical platforms, two radically different philosophies: one designed to endure, the other to excel.

Let’s first compare the steel. Two of my favorite high end alloys and luxury, in this case, does not come from polish or presentation. It comes from intent.

The UKPK Salt, dressed in serrations and armed with Magnacut, carries the modern obsession with resilience to its logical extreme. This is not a steel that negotiates. It exists in total defiance of the elements: saltwater, humidity, neglect. Where older stainless steels would stain, pit, or surrender their edge, Magnacut remains composed, almost indifferent. Its toughness borders on the improbable for something so corrosion-resistant, and yet it refuses to chase the last degree of razor refinement. Its edge is not delicate—it is enduring. One senses immediately that this is a steel designed not for the enthusiast’s bench, but for the long, indifferent stretch of real use.

Across from it, the Golden Child, blade of SPY27, a Sprint Run which offers a very different kind of luxury. Less demonstrative, more intimate. Designed in-house by Spyderco, COM-SPY27 feels less like a technological statement and more like a tuned instrument. It sharpens with ease, almost eagerly, taking on a ultra fine, ultra precise edge that invites control rather than brute persistence. Where Magnacut stands its ground, SPY27 moves—fluid, responsive, alive under the hand. It does not seek to dominate harsh environments; it refines the experience of cutting within them.

The distinction is subtle but decisive. Magnacut is a wonder steel that reassures. SPY27 is an exclusive steel that seduces.

Now about the edge shape…. Here, inevitably, the steel disappears. What remains is the edge—the only part that truly meets the world.

Like Moses said, “Part the matters for me”…
—oh wait, I meant the waters. 😉

On the Salt, the serrated profile transforms the blade into something almost mechanical in its intent. It does not glide; it engages. Each tooth acts as a point of aggression, catching, pulling, tearing through resistant materials with an efficiency that borders on inevitability. Rope, fibrous plastics, anything damp or uncooperative—these are not challenges but confirmations of purpose.
You need to try it to understand it. Serrations aren’t saws—they’re teeth.
Even as the knife loses its initial sharpness, the serrations continue to function, each peak preserving a fragment of cutting power. It is a system designed to keep working long after refinement has faded.

But there is no illusion here. This is not a refined edge. It does not slice so much as it asserts itself. Precision is sacrificed for continuity of performance. Elegance yields to certainty.

To sharpen it, use the corner of a stone or a triangular rod, and treat it like a chisel-ground blade: work each serration individually, then simply remove the burr on the flat side. It’s done in minutes—easy, almost effortless.

The SPY27 Sprint Run, with its plain edge, follows the opposite philosophy. The cut is continuous, uninterrupted—a single line of intent from heel to tip. It can be tuned at will, from a coarse, aggressive bite to a razor’s whisper. There is no tearing, no hesitation. Materials part cleanly, almost silently, as if persuaded rather than forced. In wood, the blade tracks with uncanny precision; in food, it glides effortlessly; in finer tasks, it answers the slightest pressure. Here, SPY27 reveals its true nature—not through endurance, but through absolute fidelity to the cut.

And when the edge begins to soften, it does not resist restoration. A few passes on leather, a moment of attention, and the blade returns to form. There is a rhythm to it—a dialogue between user and steel that serrations, by their nature, cannot offer.

Placed side by side, these two UKPKs do not compete so much as they define a spectrum.

The Salt, in Magnacut and serrations, is a study in persistence. It is the knife that continues when conditions deteriorate, when maintenance is forgotten, when the environment becomes hostile. It asks little and gives consistency in return.

The SPY27 Sprint Run is something else entirely. It is not concerned with surviving neglect. It assumes presence, attention, a certain appreciation for the act itself. It rewards that attention with a level of precision and tactile satisfaction that borders on indulgence.

In the end, the choice is not between better or worse. It is between two forms of excellence.

One refuses to fail.
The other refuses to compromise.

And that review was also inspired (in the background) by that beautiful New Model Army song :



“We all get what we’ve got coming to us
The tide flows both ways across the seas
All following through on promises made
The roads are filled with fleeing slaves and refugees – singing

Part the waters for me

Now this motioning forward will never stop
We’re like sharks in the water, if we stop swimming we die
All coming out of the ruins bedraggled and worn
Like a people who stared too long, too long at the sun in the sky – singing

Part the waters for me

Any god will surely come, deliverance will surely come
On our knees by the stony shore, crack the sky and deliverance will come

Part the waters for me”

Screenshot
Folders, Review

UK PENKNIFE™ SALT® YELLOW CPM® MAGNACUT® — Civility Bares Its Teeth.

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Disclaimer: This knife has been provided through Spyderco’s Ambassador Program, upon my own request. Thank you to the Spyderpeople for letting me review it. 

There’s something deliciously subversive about the Spyderco UKPK in full serrated CPM Magnacut steel.
Something unique in the world of cutlery. So friendly and so formidable !
Imagine a slipjoint—non-locking, polite, born for UK legal carry—now equipped with one of the most advanced steels ever made… AND with a fully serrated edge. The kind of edge famous for emergency uses, an edge that looks like it wants to chew through a seatbelt, a rope, or your expectations like there is no tomorrow.
And yet… it works. Too well. And this is just great !

Back in the 80s, Spyderco didn’t just enter the knife world—they rewired it.
And at the center of that shift was an inventor: Sal Glesser.
Three ideas. That’s all it took:
the clip, the hole, and the teeth.
The clip turned knives into tools you actually carry—pocket, belt, or backpack.
The Spyderhole made one-handed opening instinctive, reliable… and easy to maintain in the real world.
And the serrations? They made blades hungry for fibrous materials.
Let’s get one thing straight, once and for all:
serrated knives are not saws.
They don’t remove material—they slice through it. Razor sharp, aggressive, efficient.
While everyone else was still polishing forged 52100 steel and dressing knives in stag like museum pieces, Spyderco dropped something radically different into the pocket: performance and reliability.
The early icons—Spyderco Worker, Spyderco Mariner, and Spyderco Police—weren’t about tradition.
They were about function.
Fully serrated edges. Stainless steels. Tools built to cut, not to impress.
They looked strange.
They cut like nothing else.

The Spyderco UKPK was Spyderco’s first true slipjoint, introduced roughly twenty years ago—not as a nostalgic throwback, but as a constraint-driven design.
It was built for one purpose: to comply with UK law.
No lock. A sub-3-inch blade.
But in true Spyderco fashion, compliance didn’t mean compromise.
Instead of dumbing things down, they engineered around the limitations:
a strong, confidence-inspiring pocket knife inspired by the Caly 3
with a prominent finger choil for control and safety and the unmistakable Spyderhole for true one-handed use.
What could have been a neutered tool became something else entirely:
a legal EDC that still behaves like a real knife.
The UKPK wasn’t designed to look traditional.
It was designed to work—within the rules, not despite them.
You don’t feel “underknifed” with any of the SlipIt in your pocket from the UKPK to the Squeak through the Urban.

(Pictured here with the UKPK Spy27 G10. The Salt is a FRN lightweight.)
But, yes, the UKPK has always been about restraint.
No lock. No aggression. Just that classic Spyderco leaf blade and a strong slipjoint spring doing quiet, honest work.

Link here for the forums

But now… serrations change the personality completely.
This is no longer a polite cutter— it’s a controlled velociraptor claw.


We already know how Spyderco’s serrations behave—from the long slicing authority of the Spyderco Native Chief Salt, to the feral aggression of the Spyderco Civilian, down to the unlikely precision of the “Mighty Grey Mouse,” the Spyderco Chaparral in full serrated.
(Notice on the picture: the Chaparral/Taichung serrations are “softer” than the Golden made serrated knives.)

Oh, SpyderEdge…
The bite is immediate. Unforgiving.
Cardboard, rope, fibrous material—this isn’t slicing anymore.
It’s total matter separation. “Part the matters for me !”


As you’ll notice, SpyderEdge uses a chisel grind—
which makes it surprisingly easy to maintain.
You work one side, raise a burr, then lightly deburr the other.
That’s it.
No complicated angles, no endless back-and-forth.
Fast. Efficient. Back to razor sharp in minutes.
For a blade that cuts this aggressively,
maintenance is almost… unfairly simple.

Now you’ll say: this isn’t new.
And you’d be right.
The Spyderco UKPK LC200N already brought serrations to the platform, with that ultra-corrosion-resistant, NASA-associated steel used in the Salt Series. (Click on the link for its extended review. That version exists now in green FRN.)
But this time… it’s different.
This time, CPM Magnacut steel’s turn to roar in your pocket.
And that changes everything in my book ! As I love Magnacu first.
And also because Magnacut doesn’t just resist corrosion—it brings toughness, edge stability, and a kind of refined brutality that pairs almost too well with serrations.
This isn’t just a variant.
It’s a very serious evolution of intent.



Here’s where things get almost absurd—in a good way as you get a blade that:
stays aggressive for ages
keeps cutting even when “dull”
laughs at moisture, sweat, food prep, urban abuse
This is not just durable—it’s low-maintenance lethality in a legal-friendly package.

The gentleman’s non locking folder has no business being here.
And yet—it thrives.
From the Amazonian coast to the unforgiving battlefield of my own kitchen, this “polite” knife sheds its manners the moment it meets real work.
What should feel restrained feels… unleashed.

Let’s be honest: serrations on a slipjoint feel wrong to most of knife collectors. You expect that kind of edge on a rescue knife, a tactical folder, something that locks like a plastic vault equipped with whistle.
But Spyderco pulls it off because:
the UKPK’s ergonomics are rock solid
the choil gives you a huge security if the blade closes on your fingers.
the walk & talk is confidence-inspiring, the slipjoint is hard to close.
You don’t feel under-knifed at all.

In the Real World, this knife shines where most EDCs hesitate: ripping through packaging without slipping, cutting rope under tension
food with crust (bread, cured meats—yes, really) in wet environments where plain edges can lose bite.
Nope, it’s not a bushcraft blade by design but it won’t frown to be used in the woods.
It’s not a slicey Instagram queen.
It’s a working edge for people who actually cut things or need thing to be cut quick !


The serrated Magnacut UKPK is a contradiction that became a concept.
It takes:
the legality of a slipjoint
the performance of serrations
the excellence of Magnacut
…and fuses them into something oddly perfect and reliable.

The clip is black and deep carry and all the metal elements (clip, screws, spring and of course blade) are impervious to salt water: “marine gear” is the name of the game.
Knowing LC200N green version is rustproof when Magnacut is stainless.
That green LC200N version is more sea proof if you see what I mean. But the edge won’t last as long as with the Magnacut version. 😉

The UKPK Salt Serrated in Magnacut isn’t your refined EDC.
It’s lightweight, high-visibility yellow, with a remarkably thin blade—among the thinnest ever seen on a SlipIt platform.
Made in Golden, Colorado, it turns into something unexpected:
your new all terrain folding survival tool… in a legal suit.

Overall Length: 6.91in 176mm
Closed Length: 3.95in 100mm
Blade Thickness: .098in 2.5mm
Tip Carry Position: Tip-Up

Blade Length: 2.98in 76mm
Edge Length: 2.58in 66mm
Handle Material: FRN
Lock Type: SlipIt
Origin: United States

Steel: CPM® MagnaCut®
Knife Weight: 1.7oz 48g
Clip Position: Ambi
Grind: Full-Flat

I have now installed some Titech Titanium Scales exclusive from Heinnie.
Take a look at my previous review of the LC200N UKPK Plain Edge here.

Folders, Advice

Spyderco’s SLIPIT™ Family – Which one should you choose—and for what purpose?

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The SLIPIT™, is a group of American-designed folding knives developed by Spyderco. Originating from the UK Penknife (UKPK) project
— the first folding knife to combine their one-hand-opening Trademark Round Hole™, clip carry, and a non-locking mechanism — and drawing inspiration from the Caly series, the group comprises the UKPK, Metropolitan, Urban, and Squeak models. All were designed by Sal Glesser.




The Blue Brother of my Slipit family is the UK Penknife (UKPK) Blue G10 CPM SPY 27 version AKA “The great slicer” or “The Golden Child” as it is made in Colorado when the others are made in Italy.
My UKPK is the G10-handled version in CPM SPY27 steel. It features the thinnest blade (2.5 mm vs 3mm for the other members of the SlipIt family) and offers the best slicing performance, with a cutting edge measuring 75 mm.
You can notice its this G10 version got 4 screws on the handle. (When Spyderco site is only showing 3 screws for their UKPK G10 SPY27 model)
Edit: I got an answer from Golden about that:
“The photo of the G10 model you see online is a photoshopped version of the lightweight model, which only has 3 screws. The 4 screw version is standard for the g10 variant.”
The FRN UKPK got 3 screws and a short spring/backspacer. Perhaps easier to rinse and clean. Its Salt version even exist in yellow with CPM Magnacut and in green with LC200N and also with serrated edge.

On mine, its thin CPM SPY27 blade is particularly well-suited to maintenance by leather stropping, and this model is unique in the group for employing a fork spring, likely necessitated by the longer stainless steel backspacer. Thanks to its blade steel, the UKPK also provides the greatest lateral strength of the series.

Its versatility makes it suitable as a travel knife, steak knife, whittling tool, office companion, or even a light kitchen knife.
You can even change for another style of clip if you want a toolish look.
The UKPK won’t let you down FRN or G10 version. They are great travel non threatening folders.

TECHNICAL SPECIFICATIONS
Overall Length: 6.89in 175mm
Closed Length: 3.95in 100mm
Blade Thickness: .098in 2.5mm
Blade Length: 2.95in 75mm
Edge Length: 2.57in 65mm
Handle Material: G-10
Origin: United States
Steel: CPM® SPY27®
Knife Weight: 2.2oz 63g

The Black Brother of the Slipit family is the Metropolitan, a tad shorter than the UKPK but often described in my book as having “an everlasting edge.” This model is notable as the only Slipit presented here with an FRN (fiberglass-reinforced nylon) handle. FRN is great and solid and the Metro got a full spring/back spacer.

Its key strength lies in the choice of blade steel: Böhler M398, known for delivering extremely long-lasting edge retention at a comparatively very accessible price point. Despite its 3 mm blade stock, the Metropolitan remains an excellent slicer. While M398 offers less lateral strength than CPM SPY27, it excels in edge holding, making this model particularly well-suited as a folding skinner or for heavy-duty tasks such as breaking down cardboard.

TECHNICAL SPECIFICATIONS
Overall Length: 6.31in 160mm
Closed Length: 3.73in 94mm
Blade Thickness: .118in 3mm
Blade Length: 2.68in 68mm
Edge Length: 2.43in 62mm
Handle Material: FRN
Origin: Italy
Steel: M398
Knife Weight: 1.6oz 45g

The Red Brother of the Slipit family is the Urban, my Low Profile London Traveller, produced as an exclusive edition for Heinnie Haynes. This model was acquired at approximately twice the cost of the Metropolitan, owing to its premium blade steel: CPM S90V, a high-performance alloy offering edge retention on par with Böhler M398. Now the FRN Urban is released with M398 too which makes my previous expensive Heinnie S90V Urban quest totally obsolete.

Released prior to the availability of the Metropolitan and the M398 Urban, this knife also features a G10 handle with a distinctive finish. Its compact dimensions allow it to be carried discreetly, such as in the watch pocket of denim trousers. In this collection, the Red Brother is primarily employed as a travel knife for use in London. I have it equipped with the short MicroJimbo clip for the lowest profile possible.

TECHNICAL SPECIFICATIONS
Overall Length: 5.95in 151mm
Closed Length: 3.54in 90mm
Blade Thickness: .114in 2.9mm
Blade Length: 2.49in 63mm
Edge Length: 2.15in 55mm
Handle Material: Red G10
Origin: Italy
Steel: CPM S90V (on mine) M398 for the FRN version.
Knife Weight: 60 gr (for mine) 56 gr for the FRN version in M398.

Big Pizza ? No problemo.

The Silver Brother – The Tweetanium !
The Squeak is truly a jewel within the SlipIt family. Despite its compact size, it never leaves me feeling “under-knived” when carried in a watch pocket.
I once owned a Squeak Deluxe Sprint Run with a titanium handle and Elmax steel blade, which I eventually passed on to JD. Thanks to Guillaume, I was able to acquire another example, new in box.

JD first acquired the original Squeak SC154PBK and used it extensively, praising its thin cutting edge, dependable Böhler N690Co steel, ergonomic handle, wire clip, and reliable one-handed usability.

Later came the titanium sprint-run version, which felt even sharper at the edge, requiring less effort when cutting. Its rounded titanium scales were warm to the touch, slipped smoothly into the pocket, and offered a more refined feel than the FRN model. The stiffer titanium construction also produced a stronger spring, giving the knife a crisper “walk and talk.” While one-hand opening was slightly more demanding, both versions remained capable of the classic “Spydie drop.”
The titanium scales are smooth under the thumb and provide superb ergonomics in a three-finger grip. Construction is minimalist, relying on only two body screws plus one for the deep-carry clip.

This is a three fingers grip when the Urban is still a four finger grip.

This rare titanium variant stands out as a refined upgrade over the standard Squeak—an elegant evolution of an already excellent design.
I love Elmax steel since my Lionspy. I remember beating the crap out of it and it was really forgiving: no chipping and great sharpness. It is tough for a stainless steel.

Its short blade is full-flat-ground, exceptionally thin at the edge, and employs a slipjoint-style “notched-joint” mechanism: the spring holds the blade open during use and offers resistance when closing.

It slice through a Coke bottle butt with its factory edge ! Not many models from the Spyderco line can do that right out of the box.
In practice, performance is outstanding. The small blade slices cleanly through materials such as plastic, wood, ropes and even after extended use—up to a year on my first Elmax Squeak—it remains razor-sharp with only minimal stropping required. Elmax, a rare style among Spyderco knives, is that good !

The Spyder hole and blade spine are the also the sharpest of the family. It could be used to strike some ferro rod.

Compact yet versatile, the “mini micro” knife proves remarkably capable for everyday tasks: cutting meat at the table (where the blade’s belly is especially effective), opening tags, breaking down plastic, and more. It also maintains a discreet, non-threatening presence in public and restaurant settings. It makes a great money clip too.


TECHNICAL SPECIFICATIONS
Overall Length: 5.05in 128mm
Closed Length: 3.05in 77mm
Blade Thickness: .118in 3mm
Blade Length: 2in 51mm
Edge Length: 1.75in 44mm
Handle Material: Titanium
Origin: ItalySteel: Elmax (for mine) N690Co (for the FRN version).
Knife Weight: 69 grams (48 grams for the FRN version)
The Squeak in this titanium version is the heaviest of the family.

Le Choix des Armes

  • Blue UKPK – the versatile slicer.
  • Black Metropolitan – the non locking hunter’s companion.
  • Red Urban – the low-profile city dweller.
  • Silver Squeak – three fingers power house.

Each model is reliable, discreet, and delivers outstanding cutting performance thanks to their blade geometry. They shine on the plate and impress with pure slicing ability on the hardest materials (my pastic bottle tests…). Thanks to their relatively strong non locking mechanisms, they also handle whittling tasks—yes, even the Squeak is surprisingly pleasant and powerful against any piece of wood.
And don’t forget, now their slip-joint strength is impeccable. Also each knife comes with a choil, keeping your fingers safe from unwanted blade closure.
Really, when it comes to staying open, Sal Glesser’s four slip-joint designs outclass his excellent Roadie XL—and put Anderson’s COBOL to shame.
Sharp, firm, secure, and reassuring—no surprises when handling these slipjoint knives which are proof that size doesn’t define performance. 😉

Mama Caly can be proud of her slipIt offsprings !

Folders, Photos

SPYDERCO METROPOLITAN™ LIGHTWEIGHT – C213PBK – The Perfect Hunter Slipjoint ?

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Disclaimer: This knife was supplied at no cost by Golden as part of their brand ambassador program. Spyderco’s decision to include this publication is appreciated, though the review that follows remains independent and unbiased.

This is my first glimpse at the middle Brother of the SLIPIT™, the Metropolitan.
Made in Maniago. It is an Italian Spyderco.
Un altro piccolo grande coltello !

It is the second Spyderco Slipjoint in M398 after the Roadie XL which I use a lot !


It is made in Maniago like my Heinnie Urban and it is a pure Sal Glesser design.
The blade comes razor-sharp straight out of the box. The factory edge is excellent, though I know it can be refined just a touch on leather. It’s a very thin grind—thinner even than on my Roadie XL. While M398 isn’t as leather-friendly as SPY27, it can still be brought to a high polish, as I managed with my Roadie XL after breaking its tip.

Being slightly longer than the Urban, the Metro’s handle comfortably fits four fingers when using the choil. This choil also adds an important safety feature, preventing accidental closure on your fingers. The choil-hump combinaison—acts like a guard, directing cutting force straight into the blade while relieving stress on the handle and pivot.

“Metro In the Middle” pictured: the G10 SPY27 UKPK “Golden Child”, the Metro and the Heinnie G10 S90V Urban.

To quote my friend Wayne Thomas Heywood Adamson: “So now we have a middle ground between the UKPK and the Urban. I was surprised when the Urban shrank in size but that was clearly now to make room for the Metropolitan.”

(Made in Golden – Maniago – Maniago.)
The 68mm Metro’s blade thickness measures 3 mm at the spine, with a full flat grind in a leaf-shaped profile. By comparison, the longer UKPK “Golden Child” comes in at just 2.5 mm, which makes it the undisputed king of SlipIt designs. That said, opting for a slightly thicker blade in M398 is a sound choice. M398 is not known for its toughness—certainly less forgiving than Spyderco’s in-house CPM SPY27 alloy—so the added thickness provides welcome reinforcement.

The S90V Urban is 2,9mm !

And the Roadie XL is 2,8mm

Making the Metropolitan the thicker of the wild bunch !
By an hair !

Now about the weight…

At 51 grammes it is really light in the pocket.

The action is very good. It is as strong as my Urban and UKPK. perhaps a bit less hard to close but this is not really an issue.
I have noticed the Metro’s back is a full spacer/spring construction like a G10 version (when the UKPK FRN Salt is not for example.)
It does not share the same “fork” spring of the UKPK but the same slipjoint mechanism as the Urban.
You can feel the spacer moving up when closing.

So what can we expected from this Metropolitan compared to its siblings?
A little more room for your fingers. The Urban and the Squeak are three fingers knives, the Metro and UKPK are four fingers.
This is also an opportunity to showcase M398 in a high, full-flat-ground, thin blade. The Roadie XL’s narrower profile already favors cutting efficiency, and the Metro builds on that. In terms of edge retention, M398 belongs in the same category as S90V—a steel I know well from my Urban model, where securing an exclusive sprint run was a real challenge. With the Metro, however, M398 is now part of the regular production lineup, offering users a true “super stainless” steel in an accessible package. But beware M398 does not like torsions, like my Walker in ZDP189 which has been able to survive all those years.

The Metropolitan could really be a major upgrade for my Italian Hares Hunter in Tuscany. For the record, skinning game—especially dealing with hair full of sand and dirt—puts a significant challenge on edge retention. Hunters typically don’t use their knives for woodcraft; their main task is working on hares and similar game. In that context, a blade of 68mm in M398 could offer a real advantage.

The Metropolitan—easy to carry, legal in many countries, and made of stainless steel—could be the perfect hunter’s SlipIt, which is great news for many of my friends.

Folders, Review

Six months with the Golden Child – Spyderco -C94GCBL- UK PENKNIFE™ COBALT BLUE G-10 CPM® SPY27® – The Part 2

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I have had the chance to buy that UKPK in G10 for 100 euros in January 2025.
Since, it has been my “go to the city” favorite folder.

Sometimes replaced by the Roadie XL for a lower profile or Dredd my Urban in S90V made in Maniago and exclusive to Heinie in the UK.


The UKPK is remarkably versatile, proving itself even in woodworking. Its strong, reliable mechanism keeps it ready for anything — all while remaining fully within legal limits. Stripping vines, carving rods, scraping, cutting — it handles everything with ease. The spring “lock” never falters, and the finger choil adds an extra layer of passive safety, even if it’s rarely needed.

Its thin yet strong CPM SPY27 blade is a true joy to use on wood. In this domain, the UKPK stands out as one of Spyderco’s best hidden gems across all categories made in Golden. And if I ever had to defend myself against an animal, I believe it would perform every bit as well as the legendary Calypso (all the story here).

The tip has seen plenty of use, and all I can say is that Spyderco’s in-house SPY27 steel is extremely forgiving. You can push it hard with no damage to the edge. I’ve compared it with many of my favorite wood-cutting knives — including some specialized for woodworking — and it performs impressively in the same league.

One way I now measure the value of a pocket knife is by the pleasure I get from using it. The UKPK easily ranks among the top on my list. Strong, thin, and precise, it excels as a true “matter separator,” handling everything from everyday tasks to more demanding jobs like scraping paint.

There’s also a distinct joy in keeping the edge razor-sharp, and SPY27 has become my new favorite for that. Achieving a razor edge is a breeze. Being in the AEL-B class, it’s even easier to work on than Magnacut and is extremely leather-stropping friendly. After just a quick session on leather, SPY27 regained that legendary crisp edge — and it’s such a pleasure to use!

Hairs are flying and the convexed home made edge is shining like a mirror.
This is really part of the joy to use leather strops on a steel.

So it is a joy just to strop it again and again just to maintain this razor edge.

Then for forced push cuts, the geometry of the UKPK is just a killer.
It goes deep like a thin Opinel blade can go.

To keep the knife sharp, I’ve mostly relied on leather stropping, with occasional touch-ups on white ceramic, even after cutting cardboard, plastic, acidic food, and hard wood. The UKPK in SPY27 is a winner, offering a significant boost in edge retention and versatility. Maintaining its vorpal edge is even easier and more enjoyable than with the excellent Magnacut or LC200N versions.

It’s no wonder this steel has earned such a special place in my heart.

And I was not able to get any chipping or edge bending in six months.
It gives an hint about the high quality of the inhouse heat treatment on that inhouse steel.

Used in the plate, the SPY27’s core refused to be damaged:
no pitting, no rust, no stain. No damage on the plate ceramic too.
It a gourmet companion and a wonderful carnivorous friend.

In the kitchen, geometry-wise, the UKPK can compete with the best — for example, the Patrick Bonetta Kitchen Warrior. The G10 version is also a visual delight. I never felt “under-knifed” with my Urban, but the UKPK could easily be my one and only Spyderco. A three-inch, legal, high-performance sharp blade is a must-have for EDC, and such knives are surprisingly rare.

This is 100% Sal Glesser design. This Golden-made gem is the all-terrain pocket knife my grandfather would have dreamed of!
Hence its name The Golden Child. 😉

For an alternative you can now get The Metropolitan. Its little brother.

Review

Spyderco -C94GCBL- UK PENKNIFE™ COBALT BLUE G-10 CPM® SPY27® – The Blue Djinn Who Loved Leather.

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This is not the first UKPK I have reviewed in this blog. I was a very early adopter of this Sal Glesser’s approach of the modern slipjoint all made in Golden Colorado.
Some of my favorite are the Salt Versions in FRN: the Green LC200N and the Yellow CPM Magnacut. I even think, the serrated version of the Magnacut version could be an amazing legal travelling knife.

But they are FRN versions. I like FRN but I do love G10. Better, I’m a sucker for sanded G-10. Hence my love for the Heinnie Urban and its non-slip peel-ply texture.
At first glance the satin-finished CPM SPY27 blade and signature cobalt blue peel-plytextured G-10 handle scales are juste gorgeous. Here are the full specs on Spyderco’s pages.

Like the Heinnie the skip joint got a strong mechanism. It is really a pleasure to feel this resistance which was totally absent from the very first drop point UKPK a decade ago. (Picture from Mr Blonde, Spydercollector site)

So far, I cannot imagine my self opening it with a flick like I was able to do on the LC200N FRN version. The Spring here on this G10 version is much stronger.

Let’s do some size comparaison. The UKPK is one of the long Slipit in Spyderco’s collection. It is almost a slipjoint Caly, even longer than a Chaparral. So you really don’t feel “underknifed” when you carry it in your pocket as your only EDC. It is also really handy and practical as a kitchen knife. The best thing is that this design keeps its blade length legal in most countries.

For cooking I often use a Native Chief.

The long leaf shaped blade is a must in the kitchen almost idea. It is pointy enough and its is enough for vegetables. Most of the works done in the kitchen like peeling potatoes, cutting oinions, you name it, was always done with a short full flat ground knife like a “Nogent Couteau d’Office”.

Something about the G-10 version is the spring/back spacer closing the handle of the knife when the FRN got an open handle easier to rinse.
But it is much more gorgeous and with a stronger spring for sure !

It also gives a little more heft to the knife. 48 grams for the FRN and 63 grams for the G10 version -> 31,25% heavier to be precise, almost a third ! But I do really love my heavy butt knives since my Schrade Sharpfinger.

Now this is my first CPM-SPY27 knife. Spy27 is a alloy recipe created in house with Crucible exclusively for Spyderco. It is a CPM ! So this is a premium super steel compared to VG10 or N690… In short it is a American Powder Metallurgy version of the Japanese VG10.

In Sal Glesser words:
“We offer many steels for several reasons;
1) We are Steel Junky’s (even Edge Junky’s) and we like to experience the different flavors and we try to do that.
2) We believe that many of our customers are also Steel Junky’s (even Edge Junky’s) and they too get to experience and play with and “taste” as you say, the many options.

I wanted a USA made “tweaked” version of Gingami 1 by Hitachi and after some effort with Carpenter, we have a powdered USA made steel called CTS-BD1N Which is a refinement of Gingami 1. I wanted a USA made “tweaked” version of Takefu’s VG-10 and now we have a powdered “tweaked” SPY27.“

Carbone1.25%
Chrome14%
Molybdène2%
Vanadium2%
Niobium1%
Azote0.1%
Cobalt1.5%
Manganèse0.5%
Silicium0.5%



There is a very nice analysis in Knifesteelnerd and discussion here: https://forum.spyderco.com/viewtopic.php?t=94182

“However, it should be noted that the SPY 27 Larrin used for testing was not heat treated by Spyderco. Some minor differences between Larrin’s heat treatment and Spyderco’s heat treatment can probably be expected. That being said, Larrin is the best source of consistent, objective data and metallurgical interpretation for steel comparisons.” To quote Karl_H in
https://forum.spyderco.com/viewtopic.php?t=87383

“SPY-27 will hold the fine edge longer… Its all about the stability of the fine edge, not the total wear resistance until fully dull. In this regard, SPY-27 can do what other stainless steels cant.” to quote Submicron in the same thread.

I am aware that Cobalt’s dust can be an health issue. Of course Rex 45 and Maxamet (10% of cobalt, 1,5% for SPY27) are the heavy weight steel in their tool steel category but the Spy27 (like VG-10), like all cobalt alloys needs to be carefully cleaned after a sharpening process.
(Cobalt may cause an asthma-like allergy. Future exposure can cause asthma attacks with shortness of breath, wheezing, cough, and/or chest tightness. * Cobalt may affect the heart, thyroid, liver and kidneys. * Repeated exposure to Cobalt dust can cause scarring of the lungs (fibrosis) even if no symptoms are noticed. According to https://nj.gov/health/eoh/rtkweb/documents/fs/0520.pdf)


Let say SPY-27 is in the same club as the S35VN steels in terms of performance and it especially loves fine ceramic and leather stropping. It gets easily a very crispy edge like VG10 or BD1N . ( Steel which are “leather super friendly” are also LC200N, 52100, VG10, AEB-L… )
This is a must and a real pleasure for me as I keep my knives sharp mostly with leather. A touch up and it makes flying hairs from my arm again.
And it seems true so far. I have not deshouldered the edge yet and intend to use it with the factory edge for some times but leather made it hair popping sharp. (Once deshouldered it is a straight razor with excellent edge retention… much better than S30V).
To quote Sal:
“SPY27 for some reason, seems to be punching above its weight.”

No crossroads, this Blue Djinn loves leather like the Bill Moran FB01 in VG10 loved it.

No need to use diamonds unless you want to reprofile the blade or round the shoulder then don’t forget to rinse the blade and to clean any dust.
But talking about dangerous dust, I have sanded the scales to preserve my pockets. Never breath that dust !!! Do it under water or wear a mask.
I got a neighbor who has been working around that kind of heavy dust and now he is breathing with two tubes in his nostrils. So be careful with your health.
This Blue G10 got a very nice texture under the thumb like some denim, textil like. It is really pleasant, almost like some Micarta found on the QSP Penguin.

So when you sand G10, just go outside in the wind or work under water. You don’t want to breath G10 dust made of fiberglass and epoxy.
Just rinse it under the tap to have it back to normal.
Once tuned at your hand, G10 is a very very nice material.

As you can notice the scales are even thicket than the blade and the blade is perfectly centered.

There is the famous middle/half stop when closing or opening the knife. It works like a safety measure. This knife is harder to close than to open.

The UKPK is a very ergonomic knife. It feels like it melt in the hand. It is so confortable for heavy cuts. Because this blade can work hard with zero play.

The “pistol grip” is common in many Sal Glesser design like the Endura or the Military. It is much more pronounced on the Massad Ayoob.

No hotspots for me a very safe handle, really, this lil slipjoint is screaming to be used hard.

It is even confortable edge up.

With the Roadie XL. Another great Slipit with a very low profile, almost like a pen in your shirt pocket.

And the mighty Chaparral serrated. Two of Sal’s best designs. Two wolves in sheep disguise thanks to their thin solid blades.

I have decided to de-shoulder the edge for a gentle convex result in the middle of the belly.

My old leather with some polish compound is ready again to smooth the edge to razor level.

Because I want a better touch on the leather, I usually keep the normal edge at the point to keep material there and near the ricasso as I use this portion for special shores like removing the aluminium cap on bottles.

The Coke Bottle Butt test is passed with flying colors. As you can notice the plastic is 3mm thick. Not a single scratch on the blade.

So what do we got so far ?
A master piece of knife design by monsieur Sal Glesser with a strong construction and state of the art in-house alloy serving a thin blade and an ergonomic handle.
My advice: try to grab one before they disappear, it seems that G10 version is not here to last and it is really a sapphire: a true blue jewel !

Review

Spyderco UK Penknife Salt – All terrain slipjoint Part II

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Prologue: “Seeing what I believe.”
On one of the social networks an happy owner of a new Spydiechef in LC200N steel (like the UKPK) was displaying some pictures of his new acquisition. And there go the comments, mostly to congratulate him and share experiences… when I have noticed some young guy’s: “Too bad this knife is provided with a steel softer than the wooden board it is displayed on.”
I thought to myself: could LC200N have a reputation of being soft ?
Immediately I have checked the Rockwell of Spyderco’s LC200N found on various sites and apart the LC200N Mule being at 56 HRC, it is known to be currently at 58 HRC.
So I have asked to young guy (very proud of its REX45 collection) what LC200N knife he has had such a bad experience with, sharing with him my own mostly excelelnt experience with LC200N I own.
After a very long passive-aggressive answer from him (we know how people are such a d1ck with a keyboard under their fingers…) about how he was so knowledgable by just watching videos on youtube he then wrote me that he had never owned any knife in LC200N.
So eventually this guy was pissing on the parade with zero knowledge of the subject. It is typically the kind of behavior we can notice on the social networks those days. Some so called “experts” don’t believe what they see but only they only see what they believe. The armchairs specialists are long disappeared and here comes the arrogance of the “believers”.
This is the plague of our time: not being your own source. Not checking twice. And not experiencing first hand what is put as a statement.
This is some kind of Reign of Assumptions with its digital garden where flourish fake informations in all subjects. This is not something to be taken lightly. And the only cure is being your own source then read, check and cross opinions.


Anyway…
Is LC200N as soft as wood ? Certainly not. It is even much better than H1 in terms of edge holding. (H1 being the other steel on the Salt Serie).
But H1 is excellent on serration blade, as it is getting harder during the serrating process like 67HRC. (H1 being a work hardened steel, the process that grinds the SE blades hardens the edge to 67, while the PE blades are 58.) Also you can’t have flat ground blade with H1 but you can with LC200N.
So far, LC200N as 58HRC has amazed me. Of course it is not in the range of Maxamet or 20CV but it is worry free good edge holding and not chipping edge’s steel.


Also I have notice how people believe cutting wood is the ultimate edge holding challenge. Nope. Cutting clean piece of wood is not challenging in my own experience. I have found different grain of steel react on different grain of wood. M2HSS (Speedstar steel) gave me soft surface on chestnut cuts for example. The challenging media to cut through are brown cardboard for example because of sand in it. Cardboard and also great way to refresh an edge by stropping the blade on it.
You can have a look at my journey in Tuscany with the Spydiechef.

Back on the UKPK. I have “unshouldered” my edge to get to a gentle convex, keeping the manufactured edge with its microserrations. I always do that when I love a knife as my favorite way to refresh my edge is using an old barber leather bought in Tuscany on a garage sale 15 years ago.

The blade stays “lock” in open position when stropping and this is much better that previous version of the UKPK like I have stated in the first glimpse. The razor’s level of sharpness is easily restored and the thin blade goes steadily into all material it has encountered.
One great enemy of a fine edge is the plate under the meal. Many times I have given an angle to my knife to avoid touching the ceramic at a 90° angle. With the UKPK I have not given a shoot. I have use it as my steak knife like they were no tomorrow. Also the the yellow knife has been friendly approved by the rest of the family who has used it also on plates and stuff without any sign of pity.
The edge near the point has rolled but nothing I could not fix in less than 5 seconds on a ceramic rod. Eventually the rest of the blade was mostly as razor as before. On short blades mostly the point and the very first part of the blade are used on board/plate cutting. It is also a part I have less convexed to keep some useful thickness there.
Of course cutting lemons and any acid food will never bring any sign of patina on LC200N and many times I have fold it dirty when it was not just quickly rinsed under the tap.
The UKPK also offers a very pointy blade which proves to be very useful in many task. LC200N being very forgiving it is sturdy enough for not having any concern about it. Of course I won’t use a slipjoint like a bushcrafter or even the great Wolfspyder but still, old timers used to go in the wood only with Swiss Army Knives or Pradel slipjoints folders and were able to use them for many camp tasks. The choil and hump of the UKPK’blade working as quillions you can apply a lot of force directly to the blade as I have also been whittling with it.

The thin spine makes it not really confortable for thumb pushing cuts though. In that game of pushcuts the Yojimbo 2 is king with its 4mm spine.
But the UKPK goes deep in its cut without much pressure on the spine.
Also when the blade is stuck in the wood it has no tendencies to fold on your finger like previous version of it. This is a great relief.
The yellow handle looks like plastic but those FRN slabs are very rigid. There is no play and it gives you a felling of confidence in your tool. Also the “pro-sheeple” general look helps a lot when using the UKPK in public.
So far it has developed zero plays which is enjoyable.

Quick draw: a friend has challenged me to open the knife using my major finger. At first I thought it would not be possible unless being Check Norris. Eventually:

But this is in Spyderdrop that the UKPK is steadily open: holding the knife by the hole and with a flick of the wrist.
So it is a slipjoint with a very fast draw opening.
The previous Spyderco Splijoint as fast as this one is my Pingo which can be open by inertia as the momentum of the thick blade helps a lot.

So far the UKPK has proven to be a fun knife to use. It is easy to deploy and reliable on the tasks. It can be a primary knife in the city and secondary knife in the woods and its lightness makes it easy to keep in the pocket. It will also find a place to be clipped on any swimsuit and that what makes it so unique. Fishermen will be very glad also as it is so easy to clean and to spot. The opening of the 3 screws montage on this UPKP (some other G10 UKPK got a longer spring/backspacer and 4 screws) make it a breeze to rinse. It is a Gentleman/Lady knife with an all terrain attitude and a very reliable positive semi locking system which can sustain a lot of power cuts. Really a unique gem !

Yellow and black works well together…

Folders, Review

Spyderco UK Penknife Salt LC200N C94PYL Yellow — First Glimpse at The Diver Slipjoint !

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“Originally developed in response to restrictive knife laws in England that prohibited the carry of one-hand-opening lock-blade knives, the UK Penknife was the trailblazer of Spyderco’s unique SLIPIT™ line of knives. Now this iconic knife makes history again as the first non-locking member of our ultra-corrosion-resistant Salt® Series.

Its full-flat-ground, leaf-shaped blade is precision machined from nitrogen-enriched LC200N steel and housed in a high-visibility yellow FRN handle. A reversible deep-pocket wire clip and fully accessible Trademark Round Hole ensure that this fearlessly corrosion-resistant cutting tool is both left and right-hand friendly.”


That’s Spyderco’s original topo—and in many ways, still the best way to describe it.
I’ve had a UKPK before.
Got it as a gift at the Amsterdam Minimeet—early days. GIN-1 steel, different blade shape… and, if I’m honest, a disappointing slipjoint.
The spring was weak.
Much too weak. Not unsafe—but not pleasant either. It lacked that decisive resistance you want when the edge gets serious.
So expectations were… cautious. And then came that Salt version.
What a surprise.
The slipjoint is finally where it should have always been: strong, confident, reassuring.
No lock but strong enough to make real work enjoyable again.
It changes everything.

Unlike its smaller siblings (the Spyderco Urban and the Spyderco Squeak) the Spyderco UKPK got a true four-finger handle.
Index finger is placed into the choil as secondary security.
Hand wrapped fully around the handle.
That’s your safety. Not a mechanism: your grip.
And in use, it makes perfect sense.

The choil on the Spyderco UKPK—much like on the Spyderco Military C36—is not just a modern ergonomic flourish.
It’s actually a throwback.
A direct echo of 19th-century San Francisco gambler’s boot daggers.
From the engineer point of view (and inventor like Sal) with your index finger locked into that choil, force is transferred straight into the blade—not “lost” in the handle, not stressed through the pivot.

This is closer to the logic of ancient Roman folding knives, where the handle was almost secondary—more considered as sheath than a structure.

The UKPK’s blade is thin—and Spyderco delivers one of the highest out-of-the-box cutting performances in the game. Mine cuts like a razor.
Pure, immediate efficiency.

Geometry-wise, this sits right alongside the best European slicers—think Manly’s famously thin grinds, or even the simplicity of an Opinel knife.

This is not a knife for Medford Knife & Tool fans.
No overbuilt slabs. No brute-force thickness. This is finesse.

There’s a strong European flavor in that leaf-shaped blade—very reminiscent of the Spyderco Caly3. In fact… this might just be a kind of UK Caly.

The blade is long, lean, and pointy which means one thing: it requires less force to do the job.
My plastic bottle “butt test” says it all.
Right through the thickest part, dead center, with steady control. No slipping, no tearing—just clean penetration and continuous cut. With your index finger locked into the choil, you can choke up for delicate work, gaining precision without sacrificing reach.

In fact, it completely cancels my long waited/need for a slipjoint Native.

Before Magnacut, there was LC200N steel—a true “space steel” used by NASA that proved its worth far beyond corrosion resistance.
Users of the Spyderco Spydiechef—myself included—know how stable that edge is, how easy it is to bring back, and how forgiving it remains under real work. A true workhorse’s steel. Like a rustproof 52100 ball bearing steel.

The yellow handle? Sooooo friendly. Almost playful.
WIth its black screws and clip, it looks like scuba gear—and that’s exactly the point. This is a knife made for the sea. Pure marine gear.
For salt, humidity and neglected pockets.

The serrated version takes it even further—perfect for mariners dealing with fibrous materials day in, day out. You can read the review of the Magnacut version from 2026 here.

That’s the whole idea behind the Salt Series:
carry it dirty, soaked in saltwater, forgotten in a pocket…
and do not care.

At just 48 grams (1.7 oz), the UKPK FRN is a true travel companion.
Light enough to disappear. Capable enough to matter.
The deep-carry wire clip is perfect—even tucked into a watch pocket on a pair of jeans.

Always there. Never in the way.

There is no vertical or side to side play on my Spyderco UKPK.
The spring retention is excellent—firm, consistent, confidence-inspiring.
The jimping bites just right under the pads of the fingers.
Everything feels locked in… even without a lock.

It stands as a serious contender to the hyper-polyvalent Spyderco Native Salt—which, in my book, still suffers from one flaw: its clip, and a slightly toyish, boxy handle.

Subjective? Of course.
But the UKPK feels more refined. More… intentional.

What you get here is something rare:

A true all-terrain slipjoint.
Strong mechanism. Thin, pointy blade.
A knife impervious to the elements.

Clip it to a swimming suit.
Shuck oysters. Cut rope. Open boxes.
Forget it in saltwater—and just keep going.

The UKPK Salt may well be one of the best “Made in Golden, Colorado” folders.
More than that—
it might be the very first true scuba-diving slipjoint. The serrated FRN could be even better. (Now their FRN is green for all LC200N versions)

And here’s the real trick:
It’s a marine slipjoint that makes you forget it has no lock.

There is a Part II here: