Dark Ops Knives are made from a proprietary hybrid alloy of Chromium, Cobalt, Tungsten, Vanadium, and Molybdenum with surgical grade stainless steel! CTV2 offers both strength and edge holding ability that is unrivaled! Zone selective cryogenic hardening allows for medical grade edge sharpness while avoiding the brittleness of high Rockwell hardness...

In other words a market ploy.