Defender Security U 9572 1-3/8-Inch Thick by 2-3/8-Inch Backset and 2-1/8-Inch Bore Door Reinforcer, Antique Brass Solid brass construction; antique brass finish Use on wood or metal doors with mortise or drive-in latches Accommodates key-in knob locksets or deadbolts Reinforces and repairs doors For 2-3/8in. backset and 1-3/8in. door thickness