Tag Archives: Zero Tolerance

Tuscan Raiders #4 – Geometries, Gayle Spyderco Gayle Bradley Junction and whittling.

It has all started when I wanted to review the Spyderco Gayle Bradley Junction. It’s a great design for an EDC fixed blade which can be used for everything. Easy to carry in its pancake constructed bolteron sheath. But the edge was just too thick for my own use. To my knowledge, SPF27 is some kind of CPM D2 steel. A lot of carbon 1.5% and not a lot of chromium around 12%. Not the easiest on the stone as a semi stainless. It was not very soft under the diamonds compared to another blade in N690 HRC59 I got with me. And it was not really easy to remove the shoulder to create a gentle convex edge. Patience… In sharpening is important. And I often lack of it but I was able to improve it. Next some black stone mostly to remove the scratches. And then the white ceramic to get a better finish and a razor steel. You can notice the chamfered signature hole on the Junction. A première. The cuts were deeper. It was better! Much more enjoyable. But the spine was too sharp for my thumb and diamonds came handy to rounded the angles. It would never be a Sebenza spine…. Again the control during whittling was much much better. One should never be scared to round the edges for suiting your own needs. The handle is very flat on that knife. It’s an attention for people who wish to stash their knife in a pocket or a backpack without leaving a print. But a flat knife is not the most comfortable in the palm of your hand… Especially when cutting hard things for a long time. I decided to make a quick comparison with the Spyderco Sprig which is a pleasure to use. You can notice how the Phil Wilson’s Sprig got a thicker handle. And it change everything when cutting hard things. Also Phil Wilson’s is all about performances. Its geometry is stellar. It immediately cuts deep in wood without any real improvement needed…. But diamonds were there to be usef. 🙂 I was able to get thin regular cuts into the wood. So I have decided to try the diamonds on the Gayle Bradley Bowie I have brought with me. This one got a thicker geometry and is made if the same pulverized alloy as the Junction You can always improve an edge. Used as a light chopper it worked just fine. Gayle Bradley has provided a great compact Bowie which can be used as a light camp knife. You can see: it’s not a lot bigger compared to my Ed Chempp Bowie. And the edge once thinned is honorable. Of course it is not as thin as my Pekka Tuominen Urban II for example. And not as aggressive as the Sprig… I got…. too much knives on my table…

It was time to go to lunch. An Francesca knows how to prepare the pasta with pomodori. Crostini a la Toscane. Poultry liver, oignons, red wine, bread and a Bowie. Back in the outside I was thinking of a simple way to see the “impact” of good geometry on whittling. On the right, a single cut if the thin Delica and, on the left, a single cut of the thicker ZT0562CF. The Delica cuts deeper on a more open angle. Better geometry. But the ZT was pleasant to use even if it was not as fast at the job. Also the Delica was able to cut from the ricasso to the point without any hard pressure. In the end, I had noticed that the Junction was less good than the Sprig and the Delica was still the best whittler in the batch. No matter the steel, for wood cutting, geometry is queen. So I have taken my Bowie back to the diamonds and put a keener edge. Tomorrow it will be hunting day.

Zero Tolerance 0562CF — Bright and Beautiful.

wp-image-1933490811 My first Zero Tolerance was the 0770CF and I was really amazed by the quality of manufacturing provided by that Peter Kershaw’s brand. But I wanted something hardchore, heavier at the opposite of my C36 Military which is light and fast like the Hussein Bolt of knives. I have given a chance to the Megalodon, Real Steel flagship. But a poorly designed clip ruined my experience. So I have asked some advice on the Zero Tolerance Facebook group and I have invested in a ZT0562CF ! RIL lock, deep carry dark clip, no hot spot on the handle. The attention to detail is amazing and the ooze of quality. Designed by Rick Hinderer it has won Best American Made Knife at the Blade Show some years ago.

It’s a true flipper, the “thumb” studs cannot be used to open the blade as the detent is too strong. They are just here to be part of the lock. Their also a stop pin but it’s only used to stop the blade once closed not opened.
The first edition of the Real Steel Megalodon used to have the same system and the handle kept that “S” on the front which form two horns which can used as deterrent in case of self defense situation.wp-image-1687282944 As you can notice, it’s easy to pinch your finger between the stud and the handle when opening the blade. So really, it’s a true flipper made to be open in that way. And here the experience is wonderful. The smooth KVT ball-bearing opening system. A washer with caged ball bearings surrounds the pivot and makes opening the knife nearly frictionless. Only the detent ball brings some minor friction actually. But it’s really minimal. The knife opens every time. The balance is perfect, just behind the pivot. So the blade is alive in my hand. wp-image-133474584 What you noticed first when handling the ZT0562CF is her smooth Carbon Fibers scale and butter like action. It’s 156 grams heavy compared to my Military 120 grams (titanium clip)… You fee the heft. And that’s exactly what I wanted. The corners are chanfered and there is no hot spots even the clip is not felt in hammer grip. I love the details on the blade: the stonewashed flat side and the satine grind. wp-image-748540201 It offers alsmot the same working edge. It carries tip up and it’s not as fast to draw as the Millie even with its titanium deep carry clip. The blade is made of CPM 20CV but it was first offered in M390 and CTS204P like on the Spyderco Southard. “CPM-20CV has a high volume of vanadium carbides and a high amount of chromium. You get exceptional edge retention and outstanding corrosion resistance.” said Zero Tolerance site. In fact CPM-20CV is the twin brother of M390 and CTS204P. Different manufacturer and same super steel with at 1.9% carbon, 20.0% chromium, 1.0% molybdenum, 4.0% vanadium, 0.3% silicon, 0.6% tungsten, and 0.3% manganese. The heat treating and the grind will make the difference. But as a Powder Metallurgy (PM) tool steel, you should get a combination of impressive wear resistance and edge retention plus the added benefit of being highly corrosion resistant due to its high level of chromium. wp-image-36373330 You can notice the different surface works on that picture. But as far as the blade was beautiful I felt the edge was thick compared to what I’m used too.

And unfortunatly the ZT did not pass my Plastic Bottle Butt’s test ! It was blocked and even a saw motion did not change anything. The blade was stuck before to reach the thicker part. So I had to summon: the diamonds, the sandpaper and the ceramics and put on thinner edge on that beast of a knife.

wp-image-170153826 I have started with the diamonds of the Fallkniven DC4. It was not easy as I felt the thumb studs was going in the way. eventually I was able to de-shoulder the edge and even to scratch the blade. That “Hinderer flat-ground “slicer” grind” that should provide both slicing efficiency and a tough point was not easy to get at first. wp-image-908967677 Against the scratches I has used a P1000 Sandpaper and they were erased. No big deal. They have disappeared just but doing an 90° motion. I have treated all the blade for good measure. wp-image-737758906 Then came the work on the brown stone, the brown ceramic and the white ceramic. My edge was slowly going convexed. My favorite one for stropping. Soon CPM-20CV was back to razor. I was amazed by the way the steel react under the ceramic. It was much easier than I thought. I had the same excellent experience with my Southard.

Then came the leather work with some polish white paste and I was able to achieve a nice mirror finish. At all it took me one hour for thinning and polishing the edge to my own taste. wp-image-1937876634 wp-image-1775073832 True convex razor as the hairs were jumping on the blade.

It was time to test it on the Coke bottle butt again:

And this time it was a success ! The blade pushcuts steadily through the thick transparent plastic. And then on tomatoes skin which can be tricky with a polish edge.

Some mozarella slices… with its open construction it was a breeze to clean under the tap.

And eventually all the ingredients wre turned into a salad for lunch. Conclusion: the ZT0562CF is now in my pocket to be tested on a longer run but it already got such great qualities to make it a keeper: unearthy smooth operation, great ergos, best high tech materials and top notch steel. The thumb stud does not get in the way while cutting and the point is strong enough to feel confident about its resilience. The innovative deep carry clip makes it easy to disappear in the pocket. It’s the perfect adequation between hard working and gentleman folder. Now you can also check the Falcon here which is a true jewel in that flipping matter.

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Zero Tolerance ZT0770CF – Fast and Furious.

I love my Spyderco mantra 2.
Great engineering, ergos and materials. An attention to details and a signature: Eric Glesser. He is a perfectionist and a clever one. But I do hate one thing: the trademark “little” hole. A place to catch grim and hard to clean on the field.

Why don’t you just print a circle instead to drill into the blade ? The trademark hole is even on my Spyderco fixed blades…
Anyway, the Des Horn was a first step. A second step is the ST0770CF.

I was in need of a “blind” folder. I mean a folder without any hole or thumbstub or disk.
The Real Steal Megalodon was on my list: with its beautiful lines like a Sukhoi 27, M390 steel….
But then the Zero Tolerance caught my eye through all its great reviews.

ZT knives were always synonym of heavy fat ground knives à la Strider. Not something I would enjoy as EDC.
Unless I start to follow a special project around the ZT0770in M390 and especially a version in CPM M4 (ended with 69 dollars of international shipping fees).

So I went to “La Coutelerie Tourangelle” famous for their good prices, great shipping fees (5.9 euros with tracking in France) and total absence of communication…. 😉 Just kidding, even if they are mute like a brick wall, they delivered a great service world wide.



The ZT0770CF got no name. Its blade is beadblasted. This is a user not a safe queen.
The assisted opening is strong and seems reliable. I have found some people were able to remove the spring easily and even order another bronze washer. But my idea was to have a spring making my flipping secure and complete.
Many times my flipping was not 100% on my Southard on my Domino…. and it was frustrating.
So no ball bearing on the ZT but a strong spring. Again if you don’t like it, you can remove it.
I love it.
It is positive and definitive. SCHLAKK !! It’s open.

Now if you don’t want to be noticed you can open it against your leg, halfway and with a gentle flick it is open.
All is silent.

Balance wise, the ZT is perfect: the Carbon Fibers handle is so light. There is a black spacer, beautiful and very scifi. But the point of balance is just behind the pivot ! Perfect.
The knife is “alive” in your hands.
The texture of the carbonfiber is smooth but matte. Just like my sanded G10 handles. There is enough blade to open the knife like a gentleman folder. It won’t jump from your hands, the spring is not “that” strong.
There is a detent you can also feel at the end of the blade course.
The action is smooth, enough smooth to have the gravity works fine when unlocked.
This is a beautiful knife with a great attention to details.

The liner lock is thick and nested. Easy to operate. The detent ball is visible. Everything is in place.
The jimping on the blade is not to aggressive. The jimping on the flipper is more aggressive but do not come in contact with finger once open.

The guard is very cleverly thought. The position of the pin and the jimping on the flipper. It’s a clockwork !
Closed or open, there is no hot spot on the ZT0770CF, all lines flush together: very impressive.

The pivot screw is beautiful and despite its exotic look just need a torx to be unscrew. You can rest your thumb on it, it works like my Calypso’s screw guard.
The CF handle is renforced by nested liners and despite being light the construction is very solid.

Ergos are great. I mean they suit my four fingers. I already loved on my Mantra how the flipper served as guard once the blade open. Here on the ZT the guard in integrated with flipper like on the Domino but more pronounced. I really love that configuration.

The ZT got a particular blade: high flat thinly ground with a kind of sheepfoot shape. It works.
You got some belly near the pivot and a straight edge near the point, something between a Spyderco Positron a stretch Cricket.

It cuts aggressively and pass my plastic bottle bottom with force and ease. Eventually I find the ZT’s blade is simply gorgeous, all in curves… The belly near the pivot will give a lot of power for pushcuts into wood.

I love Elmax since my Lionspy. I remember beating the crap out of it and it was really forgiving: no chipping and great sharpness.
Also I’m in love with a Squeak in Elmax with titanium handles for a year now and this pure little Italian wonder will be review soon.

Elmax is such a great knife steel. No chipping, edge stability, ease of maintaining. What not to love ?



The black clip is short but made for deep carry. This is a very low profil configuration which leave almost zero print. The knife can find a nest into the watch pocket too. We got here a very compact package and very light: a true EDC.

Great engineering all in all. Now more pictures:






Some more test once the edge is “de-shouldered”.