COAST's first SPEC-OPS knives - TX399, TX395 and TX360 - were all designed and created through coordination with the U.S. Military. These 7Cr17 stainless steel tactical knives feature one-handed opening and are safety equipped with COAST's patented Double Lock safety system to prevent disengagement when the knife is open, even if the liner lock fails. The SPEC-OPS knives are just right for military personnel, tactical units or law enforcement personnel who need reliable, safe and high performance tactical knives for everyday use.