FK2 BONING KNIFE in Carbon Fiber Composite and Stainless Steel Alloy, 5.25-Inch Blade German X50CrMoV15 stainless steel alloy hardened and tempered to HRC56; Hard for edge retention and tough for edge durability Fine grind between the thick German blades and light Japanese blade to bring strength and sharpness Thick tang for long term durability, solid one-piece bolster Rebalance system with innovative adjustable counterweights Handle shape with texture that grips strongly to resist hand slip