Large Secure Key Storage BoxIt can hold up to 5 house keys or 3 large keys. Prevent blockages and available for family, friends, AirBnB tenants. NoteAfter the password is reset, it is better to take a photo so as not to open a method if you forget the password. There is a "U" spring inside the key box, which is helpful for unlocking. Beware it may fall Double-walled constructionImpact resistant lid is impervious to hammering, sawing or prying.Heavy duty steel locking mechanism with zinc alloy body. Place keys safely in our resettable 4-digit code Combination Lock Box Weather and rust resistant steelSuitable for indoor and outdoor use. Your key safe has a weatherproof sliding locking cover to protect the combination dials from further weather damage Easy to installComes complete 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 to 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 provided screws