The Vintage PARKER CUTLERY Single Blade Derringer Gun Style Folding Lock Blade Knife is 9 inches long and a collectible pocketknife featuring a surgical steel blade with a clip point. This ambidextrous knife has a manual opening mechanism, lockback design, and a bronze handle made of surgical steel. With a blade range of 3.5 inches, this original piece from Japan is a rare find for collectors of vintage folding knives.