Case XX 58411 single blade Tribal Lock (TB612010L CV) with Pocket Worn Crandall Jig Gray Bone Handles. Chrome Vanadium Locking Spear blade. 4 1/8" closed. USA NOTE: This knife has Chrome Vanadium High Carbon blades. While considered by many the superior Case XX blade steel, Chrome Vanadium is not Stainless. It will discolor, tarnish or rust. Keep the blades clean, dry and lightly oiled to help preserve the factory finish if you so choose.