These stunning W.R. Case Dark Red Bone CV knives feature the original W.R. Case chrome vanadium blades-the traditional Case pocket knife steel-and dark red bone that offsets the blades perfectly. Chrome vanadium steel has several advantages over stainless. It is more rust-resistant, and has a higher carbon content that makes the steel harder, which means the blade will hold its edge longer. The W.R. Case Dark Red Bone CV knives are a perfect combination of form and function.