Indestructible The key box wall mount is made of high quality zinc alloy and heavy duty steel, which has excellent water resistance, corrosion resistance and weather resistance. The outer shell of the key safe is a high-strength zinc alloy casting, which can effectively withstand hammering, sawing or prying. You can install it in front of your house, garage door, warehouse and office, you don't need to carry the key to go out. .High Security Factor The key box with code adopts a 4-digit resettable password and has 10000 combinations of personalized passwords. You can set your own password and change it regularly to improve security Installation is very simple , please take a photo or write down the password on paper after setting a new password. Once you forget the password, the key safe cannot be used. .Wide UsageThe key box with 4 digit code is quite large (internal size is about 3.94*3.15*1.38inch) and can hold 8 12 keys, large car keys and other small items . The product includes a key box, four heavy screws and four expansion nuts to ensure stable installation on any wall. It is ideal for sharing access rights with your roommates. .Ideal For Sharing KeysThe external dimensions of the large key box are: 11.0*8.5*4.0cm/4.33*3.35*1.57in. The wall key safe is suitable for indoor or outdoor use. It is ideal for everyday needs such as cleaners, renovators, elderly people living alone, emergency medical care, family health visits, children's school, Airbnb and home rentals. .