Features: 304 stainless steel construction with multi-layer coating, it is corrosion resistant and very durable. Can provide the highest level of home security and key control function on both sides. The surface is made with drawing process, which is beautiful and practical. The lock core and panel are integrated together, it is convenient to install. It is widely used in front and rear doors, such as solid wood doors or steel wood doors. The internal components are made of galvanized steel and the external parts are made of stainless steel. The lock collar is free to rotate and can prevent breaking. Anti-saw locking tab with 25 mm / 1 in extension. Made of die-cast zinc alloy and high-strength integrated anti-saw lock core. Equipped with 5-hole marbled copper lock core and 3 mechanical keys. The interior and exterior are opened and closed with a key. Left and right opening doors are available. The applicable door thickness is 35-50mm/1.38-1.97in. The center distance of the lock body can be adjusted to 60mm/2.4in or 70mm/2.8in. Specifications: Item Type: Door Lock Material: Stainless Steel Color: Silver, Red Bronze (Optional) Applicable Door Thickness: Approx. 35-50mm/1.38-1.97in Center distance of lock body: about 60mm/2.4in, about 70mm/2.8in (adjustable) Applicable door direction: left open door, right open door Lock Tab Extension: Approx. 25mm/1in Function: Double locks are locked. The inside and outside are opened and closed with a key Package list: 1 x double head lock 1 x lock body (center distance adjustable) 3 x Key 1 x mounting plate 1 x set of screws 1 x mode job