Features . This collar served two purposes; first it helped protect ones neck from sword. And cutlass blows and second it forced a Marine to keep his head up straight. The military posture that was fashionable at the time. Today after two centuries of personal sacrifice on and off the battlefield Leathernecks enjoy. The love respect that Cold Steel dedicates this series of battle ready knives. The series has two distinct blade styles. Its hollow ground and honed by hand to a startling razor sharpness. Its incredibly sharp blade is 7 in. long and hollow ground by hand. Size - 6.75 in.