Marine Rescue Linerlock Pocket Knife A/O. This USMC Knife measures 5 1/4 open and closed: 3 3/4″ . 440 stainless assisted opening black finish partially serrated drop point blade with thumb studs and extended tang. Blade is etched US Marines. Black finish aluminum handles with black pakkawood inlays. Glass breaker and lanyard slot. Black finish stainless pocket clip. Ships fast! Imported.