When you purchase a Spyderco you are buying a high-quality reliable cutting tool designed and manufactured for peak performance and ergonomic comfort. Those Who Know Carry Spyderco. Originally used by the marine industry, the blade shape holds rope, line, webbing and netting against the sharpened edge, keeping it from slipping off the tip. The Crossbill's hollow-ground blade is manufactured using 8Cr13Mov stainless steel, which contains both molybdenum and vanadium, enhancing the blade's ability to hold a sharp cutting surface and wear less over time and use.