Secure your home or office doors with additional security with the U 9846 Patio Sliding Door Loop Lock. This secondary security locking device provides additional, increased home safety for sliding patio doors. It can also 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 door loop lock is constructed of a nickel plated hardened steel locking rod with a diecast bracket and keeper with a chrome plated finish. It’s strong and durable, sure to last, and installation is quick and easy. All installation fasteners are included, and it is designed to secure to door to the jamb. Exercise caution when mounting on glass panel doors not to damage your glass panel.