Prime-Line 3.31 in. L White Steel Chain Door Guard

This door chain lock is a security locking device for doors, allowing a door to be slightly opened to allow safe viewing and ventilation. The lock should be placed out of reach of children, high on a door, so they cannot open the door themselves and enter or exit into dangerous areas. This chain door guard is constructed of stamped steel and comes in a white-painted finish. It is strong and durable, sure to last, and installation is quick and easy. All installation fasteners are included, and it can be used on a variety of door types, on or beside the door casing.