Durable materialHeavy duty aluminium alloy construction protects the box from being damaged by hammer, saw, drill and so on, impact-resistant, non-corrosive and weather-resistant. High securityThis product is an adjustable combinations lock with 4 dials. It can be converted to non-resettable mode for extra security. Large Storage CapacityThe box has large space to store valuable things like keys, usb drives, house cards and so on. You can put them in it when you go to work or on vacation. Easy operationIt is easy to install and use it. You can set your favorite numbers as your passwords. The 4-digit combination is easy to remember and reset. Wide applicationThe key box can be used in many areas. It is suitable for outdoor use. It can be hung on the door for emergency entry, vacation home, pet sitters ,etc.