Suitable for outdoor use. Your key safe has a weather resistant sliding shutter door to protect combination dials from further weather damage. Avoid lockouts and is available for family, friends, employees, AirBnB tenants. Impact resistant flush mount access covers are impervious to hammering, sawing or disassembly. Heavy-duty steel locking mechanism with a die-cast zinc alloy body. Place keys with confidence in our resettable 4-digit combination key lock box. Easy to install: Comes with instructions and fitting kit. All necessary mounting hardware is included: 4 screws and 4 nylon expansion screws. Quick Installation 1.Open the box, there will be 4 holes on the back of the box. 2. Hold the box against the wall and mark the position of the holes with a pencil. 3. drill holes. 4.Put the plastic expansion screws into the wall. 5.Put the box against the wall then screw the provided screws. Note After the password is reset, it is better to take a photo to save otherwise no method to open it if you forget the password. There is a U spring inside the key lock box which is useful for unlocking. Be careful that it may fall.