Large Secure Key Storage Box It can hold up to 5 house keys or 3 large keys. Prevents lockdowns and available for family, friends, AirBnB tenants. NoteAfter the password is reset, it is better to take a photo, otherwise do not open any methods when the password is forgotten. There is a spring """"U"""" inside the key box which helpful for unlocking. Attention it can fall Double Wall ConstructionImpact resistant cover is impervious to hammering, sawing or prying. Heavy duty steel locking mechanism with zinc alloy body. Place keys safely in our resettable 4-Digit Combination Lock Box Weather and rust resistant steelSuitable for indoor and outdoor use. Your key safe has a weather resistant sliding locking cover to protect the combination dials from further weather damage Easy to installComes with instructions and fitting kit. All necessary mounting hardware is included: 4 screws & 4 nylon expansion bolts. Installation1.Open the box, there are 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.Place the box on the wall then screw in the supplied screws un