Door knob (key lock) in satin stainless steel. Easy to install, the adjustable latch can be set to 60mm or 70mm backset. For doors from 35mm to 50mm thick. Lock the interior and exterior knobs preventing 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 any other interior doors where privacy is required. Please note that the door hole must be less than 60mm. Entracne Stainless Steel Door Handle Locking Knobs Lock - Key Lock - Copper Core - Latch Size 60/70mm This handle lock set is suitable for use on bedroom doors or any other interior doors where privacy is required. The entry lock system features a screwdriver that locks both the interior and exterior 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 Key Number: 3pcs Knob Diameter: 53mm Rose Diameter: 65mm Weight: 0.5KG