Satin stainless steel doorknob (key lock). The adjustable latch is easy to install and can be set to 60mm or 70mm backset. For doors with a thickness of 35mm to 50mm. Lock the inside and outside knobs to prevent unwanted access to the room. It also includes a set of three keys that allow locking from the outside. Suitable for use on bedroom doors or other interior doors where privacy is required. Please note that the door hole should be less than 60mm.