Satin finish stainless steel doorknob (key lock). The adjustable latch is easy to install and can be set to 60mm or 70mm backset. For doors 35mm - 50mm thick. Lock the inside and outside knobs to prevent unwanted access to the room. Also included is a set of three keys which allows locking from the outside. Suitable for use on bedroom doors or any other internal doors where privacy is required. Please note that the door hole should be less than 60mm. Stainless Steel Entracne Door Handle Lock Knobs Lock - Key Lock - Copper Core - Latch Size 60/70mm This handle lock set is suitable for use on bedroom doors or any other internal door where privacy is required. The entrance locking system features a screwdriver that locks both the inside and outside knobs, preventing unwanted access to the room. It also includes a set of three keys that allow locking from the outside. Specification: Fit door thickness: 35-50mm Material: Stainless steel Latch size: 60mm / 70mm Number of keys: 3pcs Knob