Product Description Securing the weak spot of an entry door with a stainless-steel lock and door reinforcer can add additional home security and assist in preventing forced entry. Installation is quick and easy, and all fasteners are included – extra security and peace of mind can be achieved in just minutes! This combo lock and door reinforcer can be used on wood or metal 1-3/4” thick doors with mortise or drive-in latches. It also accommodates key-in knob locksets or deadbolts with 2-1/8” bore sizes with a backset of 2-3/8”. The width of this door guard is 3-7/8” and it is 9-7/8” tall. From the Manufacturer This lock & door reinforcer is constructed of stainless steel and fits 1-3/4 in. thick doors. It features a recessed latch plate pocket for flush installation of hardware. This security device assists in preventing forced entry by reinforcing the weak spot of an entry door, and it can be used on both metal and wood doors. This item accommodates key-in knob locksets on doors that have 2-1/8 in. bore sizes with a backset of 2-3/8 in. The width of this door guard is 3-7/8 in. and it is 9-7/8 in. tall. These door reinforcers are easy to install and they are used by many. All installation fasteners are included with this item.