Constructed from Heavy Duty Diecast with Black Rubber Protection. Secures your door while allowing 2" of viewing or ventilation. Easy installation with included screw pack. A swing door guard adds an extra layer of safety between you and the unknown outside your door. Much like door chain assemblies, swing door guards allow you to open the door slightly without losing your sense of security. When you use a door chain assembly, an intruder can easily force his way into your home by snapping the chain with bolt-cutters. The solid metal design of the swing door guards are harder to break and nearly impossible to cut. Install a swing door guard to keep you and your family safe.** Note that it may not work if there is molding around the door **