Prime-Line Products U 9548 1-3/4-Inch Thick by 2-3/8-Inch Backset 2-1/8-Inch Bore Non-Recessed Door Rein forcer, 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