Satin stainless steel door handle (key lock). Easy to install, the adjustable lock can be set to a 60mm or 70mm backset. For doors from 35mm to 50mm thick. Locks both inside and outside knobs, preventing unauthorized access to the room. Also includes a set of three keys for outside locking. Suitable for bedroom doors or other interior doors where privacy is required. Please note that the door hole must be less than 60mm. Stainless Steel Door Handle with Key Lock - Key Lock - Copper Core - Latch Size 60/70mm This door handle lock set is suitable for bedroom doors or other interior doors where privacy is required. The entry locking system comes with a screwdriver that locks both the interior and exterior knobs, preventing unauthorized access to the room. It also includes a set of three keys that allow locking from the outside. Specifications: Suitable for doors with a thickness of: 35-50 mm Material: Stainless steel Latch size: 60 mm/70 mm Number of keys: 3 pieces Knob diameter: 53 mm