Prime-Line Products U 9575 Door Reinforcer 1-3/4-Inch Thick by 2-3/4-Inch Backset 2-1/8-Inch Bore, Antique Brass Reinforces And Repairs Doors Use On Wood Or Metal Doors With Mortise Or Drive-in Latches Accommodates Key-in Knob Locksets Or Deadbolts Easy To Install