Key Features Built-in oxygen tank wrench Seat Belt / Clothing Cutter Window punch Liner lock release Convertible oversized thumbstud Tool kit Product Description: Built with firefighters in mind, the Gerber Hinderer is a knife loaded with features. The blade on this Gerber knife is made of thick, fully serrated stainless steel and is operated by a liner lock release. On the other end is a window punch and a lanyard ring. On the back of the knife is an integrated seat belt / clothing cutter that folds out of the way when not in use. In the middle of the knife there is a built in slot that allows the knife to operate as an oxygen tank wrench. A ballistic nylon sheath is included that holds the knife and the 9 piece tool kit. Technical Specs: Overall Length: 8.5" Length Closed: 5.1" Length of Blade: 3.5" Weight: 5.6 oz.