Features: 1.304 stainless steel construction with multi-layer coating, it is corrosion resistant and very durable. 2.Can provide the highest level of residential security and key control function of both sides. 3.The surface is manufactured with drawing process, which is beautiful and practical. 4.The locking core and the panel are integrated together, it is convenient to install. 5.It is widely used in front and rear doors, such as solid wood doors or steel wood doors. Specification: Features:_x000D_ _x000D_ 304 stainless steel construction with multi-layer coating, it is corrosion resistant and very durable. _x000D_ Can provide the highest level of residential security and key control function of both sides. _x000D_ The surface is manufactured with drawing process, which is beautiful and practical. _x000D_ The locking core and the panel are integrated together, it is convenient to install. _x000D_ It is widely used in front and rear doors, such as solid wood doors or steel wood doors. _x000D_ Internal components are made of galvanized steel, and the exterior parts are built with stainless steel. _x000D_ The lock collar is free to rotate and can prevent from smashing. _x000D_ Anti-saw lock tongue with extension of 25mm/1in. Made of zinc alloy die-casting material, and built-in high-strength anti-saw lock core. _x000D_ Equipped with 5-hole marbled copper lock core and 3 mechanical keys. Both inside and outside are opened and closed with a key. _x000D_ Left-open and right-open doors are available. Applicable door thickness is 35-50mm/1.38-1.97in. Center distance of lock body can be adjusted to 60mm/2.4in or 70mm/2.8in. _x000D_ _x000D_ Specification:_x000D_ Item Type: Door lock _x000D_ Material: Stainless steel_x000D_ Color: Silver, red bronze(optional)_x000D_ Applicable Door Thickness: Approx.35-50mm/1.38-1.97in_x000D_ Center Distance of Lock Body: Approx.60mm/2.4in, Approx.70mm/2.8in(adjustable)_x000D_ Applicable Door Direction: Left-open door, right-open door_x000D_ Extension of Lock Tongue: Approx.25mm/1in_x000D_ Function: Double locks are locked. Both inside and outside are opened and closed with a key_x000D_ _x000D_ Package List:_x000D_ 1 x Double Head Lock_x000D_ 1 x Lock Body (Adjustable Center Distance)_x000D_ 3 x Key_x000D_ 1 x Mounting Plate_x000D_ 1 x Pack of Screws _x000D_ 1 x Instruction Manual