The second knife is a brand new one from Cold Steel, and can best be described as a Ka-Bar on steroids (pictured below). It's called the Leatherneck SF (for "Semper Fi") and follows the general lines of the Ka-Bar, but with improvements. The 6 ¾-inch blade is made of a steel called SK-5, which is the Japanese equivalent of American 1080, a high-carbon tool steel. It's hardened to Rc57-58 and came to me with an appallingly sharp edge and kept it extremely well. As with the Ranger, this blade will rust, and so it, too, is coated.