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.Allows 4 inch of viewing or ventilation,Bolt slides into keyed mechanism to lock,Steel chain and diecast keeper in white,Can be unlocked with the key from inside or outside,A Phillips head screwdriver is required for installation