Defender Security U 9547 Non-Recessed Door Reinforcer 1-3/8-Inch Thick by 2-3/8-Inch Backset 2-1/8-Inch Bore, Brass Helps prevent break-ins Use on wood or metal doors with mortise or drive-in latches Accommodates key-in-knob locksets or deadbolts Easy to install For 2-3/8in. backset and 1-3/8in. door thickness