Defender Security U 9569 1-3/4-Inch Thick X2-3/8-Inch Backset 2-1/8-Inch Bore Non-Recessed Door Reinforcer, Antique 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 1-3/4in. door thickness