1-3/4 in. x 4-1/2 in. Thick Solid Brass Lock and Door Reinforcer, 2-1/8 in. Single Bore, 2-3/8 in. BacksetThis is a solid brass door reinforcer in a classic bronze finish. This helps prevent a forced entry. Typically used on wood or metal doors that are 1 3 4 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 8 in. backset. Designed for single bore doors with a 2 3 8 in. backset Helps protect against a forced entry For use on doors 1 3 4 in. thick