This is a solid brass door reinforcer in a polished brass finish. This helps prevent a forced entry. Typically used on wood or metal doors that are 1-3/4 in. thick with mortise or drive-in latches. Accommodates key-in knob locksets or deadbolts. It features one 2-1/8 in. bore with a 2-3/4 in. backset. Dimensions are 4-5/16 in. wide and 4-1/2 in. tall.