They come with a universal lock that mates with any sliding glass door.
These super high-quality units are constructed with a heavy-duty, all aluminum frame, double pane, Low-E glass and all stainless-steel hardware. Armor Flex patio pet doors are the most secure and most energy efficient pet doors for sliding glass door installation. The innovative Armor Flex pet door provides the highest level of security and pet safety with air-tight, extreme weather tight seals to protect against the harshest weather conditions and provide the best energy efficiency of any pet door made.