Door knob (key lock) in satin stainless steel. Easy to install, the adjustable latch can be set to 60mm or 70mm backset. For doors 35 mm to 50 mm thick. Lock the interior and exterior buttons preventing unwanted access to the room. It also includes a set of three keys which allow locking from the outside. Suitable for use on bedroom doors or any other internal door where privacy is required. Please note that the door hole should be less than 60mm. Stainless Steel Door Handle Entracne Lock Knobs Lock - Key Lock - Copper Core - Latch Size 60/70mm < br /> This handle lock set is suitable for use on bedroom doors or any other interior door 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: Adjust door thickness: 35-50mm Matial: Stainless steel Latch size: 60MM / 70MM Key number: 3 pieces Knob diameter: 53mm Rose diameter: 65mm Weight: 0.5KG LRFR s' is committed to providing each customer with the highest possible quality of customer service.