Defender Security U 9551 Stainless Steel Lock and Door Reinforcer assists in preventing forced entry by reinforcing the weak spot of an entry door. It can be used to reinforce and repair both metal and wood doors. Made of stainless Steel, the lock reinforcer plate comes in a natural finish. All the necessary mounting hardware is included for a quick and easy installation. The lock reinforcement plate is pre-punched for mounting. The reinforcer is designed for 1-3/8 in. thick doors that have mortise or drive-in latches. It features one 2-1/8 in. bore with a 2-3/8 in. backset. The door reinforcer is recessed. Please refer to the line art drawing for dimensions and compare to your needs before purchasing (Not Universal).