Our Sliding Glass Door Lock With Indicator Keeper will add security wherever frameless 3/8" to 1/2" (10 to 12 mm) sliding glass doors are installed. This lock can accommodate glass-to-wall or glass-to-glass inline installations. A turn of the thumbturn on the interior side of the Lock changes the color of the exterior indicator. Emergency access is made possible by a low profile screw on the exterior face. The Lock comes with a wall mounted strike plate, screws, and anchors. Both lock and keeper come with gaskets and hex wrench.