Like I have said in my previous review of that venerable folding knife :
It has taken me a very long time before to get any interest in the Police model.

My first real step in the wide Spyderco world was the Terzuola Starmate and the Millie. The Starmate was equipped with some super new steel the CPMS60V named CPM440V then. It was the beginning of the powder steels and Spyderco was experimenting on a bold plateforme even using (like the Millie) hidden nested liners !

The actual Police with its “non nested” liners is thinner than the Terzuola C55.

Steel wise:
Meanwhile in the 90’s, new Japanese steel VG-10 was used on their first fixed blade “the Moran” and the Seki made Police was then “stuck in GIN-1 or GIN-2″… Ah, I was and I’m still a “steel whore” (a term of self qualification of Sal Glesser) after all. I was unfaithful and really attracted by M2HSS version of the AFCK…  Not for the patina (as they were PVD covered) but for the benefits of getting a thin pointy blade with more lateral strength than usual stainless steels of that time. As much as I loved the AFCK, the long version BM800 was “plagued” by a titanium linerlock which was less solid than the short version with its stainless liners.

I have later used (a lot) an “oval hole” BM806 with a much stronger lock and D2 tool steel blade.

K390 is a wonderful steel. Strong even not as strong as CPM3V found in the Tuff. I have used the 4th Police as an Ice pick with no fear of breakage.

Like the famous Opinel: thin blades are such a joy to use. A super K390 gives strength to a thin ground blade and turns the “old LEO tool” into a workhorse designed for ranchers. I was disappointed the Spyderco Powerlock was not used in the new Police but, well, the Police feels so solid: I can’t complain.

Now I would do a maximum of lobbyism to get a Nilakka Sprint Run using K390. This steel used is purely a pleasure to keep razor sharp only by stropping it on leather.

Now for the con, I have found the grind is not really even. There is some sort of wave on both side of the blade. I have found it when I was convexing the edge and on light reflexion. This is purely cosmetic.
Let’s keep in mind, K390 is certainly a very hard steel to work on. I have noticed the same waving on my Pingo…

Anyway I can explain now that passionated new love for that venerable knife. It is too long to be acceptable for the Law abide citizen but, what a great tool ! It is much better than my beloved K2: less hot spots and much better blade design from Sal.

This is the same kind of love I got with the extraordinary Bowie from Ed Schempp which shares the same thinness blade wise. I would militate for a K390 Bowie sprint run ! But it seems “Made In Taiwan” sprint runs are rare.

Thinness is good ! Look at that Strudel ! 😉

Here we got a “potentially staining” steel with great (extraordinary) qualities enhanced by a thin thin blade and thin thin geometry saved by a great heat treatment, all is delivered in a slim rock solid package hence the Steel Cheetah’s nickname from my initial review.
This 4th incarnation is an outstanding heir of a great 1980’s design. Sal Glesser is pushing the limits of folding cutlery quietly and gently:
“Integrity is being good when no one is watching.” Such an inheritance !