Prime-Line U 9560 Lock and Door Reinforcer, Brass-PlatedThis combo lock reinforcer helps prevent forced entry. Typically used on wood or metal doors that are 1 3 4 inch thick with mortise or drive in latches. Highlights: Finish: Brass Plated Material: Brass Height: 9 inches Length: 3. 875 inch Lock Type: Entry Backset: 2 3 8 Inch Use on wood and metal doors with mortise and drive in latches Accommodates key in knob lock sets and deadbolts, as well as combination lock sets Helps prevent break ins Double