Keep your door locked and have peace of mind with the PetSafe Sliding Glass Pet Door Security Bar. The security bar fits between your door frame and the interior sliding portion of your glass door to lock your door. Simply unhook the security bar from the bracket to unlock your sliding glass door. The length of the security bar adjusts up to 28 inches and is compatible with human sliding glass doors that are up to 72 inches wide. Easily install the security bar with either screws or double-sided adhesive strips (both included). The security bar is compatible with your PetSafe Extreme Weather Sliding Glass Pet Door, PetSafe Sliding Glass Pet Doors or PetSafe Freedom Aluminum Patio Panel. Trust PetSafe to keep your pet healthy, safe and happy.