This lock and door reinforcer is constructed of solid, polished brass and are available for doors of 1-3/4 inch thickness and 1-3/8 inches. 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. These door reinforcers are easy to install and they are used by many. All installation fasteners are included with this item. . Available with 2-3/8 in. and 2-3/4 in. backsets.