This double cylinder deadlock is constructed of diecast and it comes in a brass colored finish. It features a jimmy-resistant design which prohibits forced entry when attempts are made to spread the door away from the frame. This is a surface-mounted, cross-bolt locking device which can be mounted to 1-3/8 inch to 2-3/8 inch thick, wood or metal doors. This door lock includes an angled strike, a rim cylinder, 2 keys, a cylinder trim ring, fasteners, a mounting plate, instructions and a tamper-resistant shutter guard. This lock requires a 1-1/4 inch hole and uses Segal keyway. It is keyed differently, but it is also available keyed alike via special order from manufacturer. See Prime-Line's model number U 9970 for a single cylinder deadlock, or model number U 9971 for the single cylinder deadlock in a white painted finish.