Rough use knives, Canam has them, you can't kill them, hard to get a good edge on but once you do, it lasts, I use one for,, well rough use batoning, digging in dirt peeling bark, anywhere you don't want to hurt your expensive knife, and if the rocks happen to dull it a bit my belt knife sharpener brings it back in about 2 minutes, great piece of kit, the handle in some rattle a bit but can be tightened easily it is just a big rivet! Buy a few they make Good gifts!