CEXECELLS 2pcs 7.5" and 11" Black Batman Dark Knight Twin Double Blade Batarang Style Folding Pocket Knife Perfect for Any Batman Fan Double bladed assisted action open, batman design on handle includes belt clip line locking system. Blade is made of high quality 440 Stainless Steel material. This knife is truly a knife to behold. They are liner locking mechanism for a safe opening. Come with 2pcs different size 11" an 7.5" knife. The folding knife is the perfect tool to carry around in your pocket when traveling.