Defender Security Door Reinforcer, Fits 1-3/4 in. Thick Doors, 2-3/4 in. Backset 2-1/8 in. Bore, Brass, Non-RecessedThis is a solid brass door reinforcer in a stainless steel finish. This helps prevent a forced entry. Typically used on wood or metal doors that are 1 3 8 in. thick with mortise or drive in latches. Accommodates key in knob locksets or deadbolts, or combination locksets. It features one 2 1 8 in. bore with a 2 3 4 in. backset. Dimensions are 3 7 8 in. wide and 9 in. tall. Designed for single bore doors with a 2 3 4 in. backset Helps protect against a