Large & Safe Storage: The capacity of the large code key box is large enough (inner size about 4.5 x 3.7 x 2 inches) to place house, office or other large car keys. And you can also store some small things if necessary, such as such as credit cards, identity cards etc. . Two Unlock Modes: This coded key safe has a 4-digit numeric code and emergency key. It allows you to define a maximum of 10,000 combinations. You can set your own passcode and change it regularly to improve security, which makes it difficult to crack. The emergency keys can be more practical in case you forget the code! . Easy Install: This outdoor key safe comes complete with 4 screws and 4 nylon expansion wall anchors to ensure the code key box can be mounted to any solid surface. No fuss or need for extra work to have a box drilled into the wall much cooler. . Solid Construction: Our wall key box is made of a strong aluminum alloy, resistant to water, corrosion and bad weather. Perfect for outdoor mount. . Wide Application: This large outdoor key box can be widely used in home, garden, office etc. It would be a great helper for any occasion. It allows you to keep and secure your car key while surfing, instead of risking hiding it in the sand/under a rock etc. .