Our Showerhardware.com Glass Door Locks with Indicator are an attractive and practical way to add security and privacy wherever 5/16″ to 1/2″ (8 to 12 mm) glass doors are used in glass-to-wall or 180 degree glass-to-glass 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 Receiver come with gaskets and hex wrench.