Designed to fit most corners and angles to ensure hard-to-lock properties. Heavy gauge hardened steel resists cutting and sawing. Hardened boron alloy staple withstands up to 8 tons of cutting force. Rolled edges protect against prying. Hidden mounting screws. Hinge pins are hidden. Carded. 7-3/4 inches. Double hinge style. Manufacturer number: 722-D. SKU #: 5069984. Distributed by Master Lock Company.