The Ontario Mark 3 Navy Knife is used exclusively by the U.S. Naval Forces. The MK-3 features a 440A Stainless steel blade with a black oxide finish. The 6.5" blade is .165" thick and is ready for duty right out of the box. Built with a molded high impact plastic handle and sheath that are perfect for wet conditions, the sheath comes with a brass belt hanger and loop. If you want a combat knife that functions well around water--the Mark 3 Navy Knife by OKC is the one for you. Specifications: Blade Steel 440A stainless Blade Length 6.5 inches Blade Thickness .165" Overall 10.75 inches Weight 1.1 LBS Handle Material Molded high impact plastic handle Blade Color black oxide Sheath Color Country of Origin USA