Knives Of Alaska Suregrip Magnum Ulu Knife Blade is 3.3" in length, Each blade is individually hand ground, sharpened, and finished D-2 high carbon tool steel, with double-draw tempering and cryogenic treatment Handles are Full Tang, Black Suregrip Sheath is vegetable tanned, oiled, split grained cowhide, with special design to ride at a 45 angle on belt. Double draw heat temper, Cryogenic "Deep Freeze" treatment. Lifetime warranty, Made in the USA