ADDED SECURITY – Prevent forced entry by reinforcing the weak spot of an entry door with the non-recessed door lock reinforcer; use to reinforce and repair both metal and wood doors BUILT TO LAST – Made of solid brass, the door lock reinforcement plate comes in a polishedl finish EASY INSTALLATION – All the necessary mounting hardware is included with the lock reinforcement plate for a quick and easy installation; the door reinforcer plate is pre-punched for mounting DIMENSIONS – The door lock reinforcement plate is designed for 1-3/4 inch thick doors; it measures 3-7/8 inch wide by 4-1/2 inch tall; it accommodates key-in knob locksets on doors that have 2-1/8 inch bore sizes, with a backset of 2-3/8 inch NOTE - Please refer to the line art drawing for dimensions and compare with your needs before ordering