HIGH SECURITY: Our combination key case is made of sturdy aluminum alloy, which is waterproof, corrosion resistant and weatherproof. Ideal for outdoor installations. A protective cover protects the combination dial from unpredictable weather conditions. Large capacity and storage space: The capacity of the outer large combination key box is quite large (inner size is about 11 .5 x 8 x 4.3cm) for placing house, office or other large car keys you can also store small things if necessary. , Such as credit card, ID card, etc. Two unlocking modes: This key safe has a 4-digit combination and an emergency key it allows to define up to 9,999 combinations. You can set your own password and change it regularly for added security, which makes it hard to crack. A backup key could be more convenient when you forget the code Wide Application: This large combination key safe can be widely used in home, garden, office, etc. It will be a great help in any occasion. It allows you to keep your car keys safe while you surf, rather than risk hiding them in the sand or under rocks etc. Easy installation: this outdoor key safe Comes complete with 4 screws and 4 nylon wall anchors to ensure the combination key box can be installed on any solid surface. A box can be drilled into the wall for a little extra money with no hassle or extra work required.