Steel mortise lock with strike plate and keys. The brass plated lock face plate measures 6" tall by 7/8" wide and the lock box measures 4" tall, 5/8" wide, recesses 3", and has a standard 2 1/4" backset. The distance from the center of the knob hub to the center of the round part of the keyhole is a standard 2 1/4". The strike plate measures 3 7/8" tall, 15/16" wide with a 5/8" tongue projection. This lock is reversible for right or left handing.