The Billy Button is hands down the best way to lock a sliding glass door. Once installed the door stays put. Installs in minutes. It is small and is out of the way. Available in White, Duronotic and Silver Gray. This part number is for Duronotic.
Installation approximately one minute:
1. Set in door frame and secure with self tapping hex head screws.
2. Close door and get mark for drilling by tapping bolt to door.
3. Then drill mark
4. Push in lock