PlexiDor Sliding Track Security CoverDescription PlexiDor Sliding Track for Security Cover for Wall and Door Models Works with Wall and Door installations Whether you leave your home for an extended period or want added security every day, the PlexiDor Sliding Track accessory makes it easy. The Sliding Tracks work with the Security Plate included with your PlexiDor Pet Door. Simply attach the left and right tracks to the interior frame and slide the security plate into place. Secure the