The Cold Steel SRK, which stands for Survival Rescue Knife, is part of the Cold Steel Battle Ready Classics Series. This knife performs well in hand to hand combat, and now with the San Mai III steel it is even tougher. San Mai III has proven to be unsurpassed in strength, sharpness as well as ease re-sharpening. The blade is 3/16″ thick, and the handle is deeply checkered Kray-Ex. This knife is standard issue for Navy SEALS attending basic underwater demolition training (BUDS). This is a tough, combat ready fixed blade knife that will serve you well for whatever mission you have.