Very Large Capacity - The large key box with combination lock has extra space (internal size: 4.3 x 3 x 1.6 inches), you can put multiple keys, such as the key for the car. house, car key, security card. More storage space than traditional key boxes. You can put your keys or car keys in it at work or on vacation. High Security - The key box with combination lock is made of hard aluminum alloy, which is durable, this material metal is rust, water and corrosion resistant. High quality aluminum alloy will protect the box from hammering and sawing. A protective cover protects the combined dial from unpredictable weather conditions. The surface of the external key box is made of non-environmentally friendly materials EASY TO USE - Set any number as a password, the 4-digit combination is easy to remember and to reset. 4 dials give you up to 10,000 combinations making it very difficult to decipher and much safer than a 3 digit safe. The safe works well and does not jam during operation. When using the correct combination, the security key safe is easy to open. CONVENIENT - The key box provides 4 loose screws and 4 expansion plugs for fixing to the wall. This manual will give you useful tips for using this product. By using a 4-digit combination padlock, you don't have to store keys near the gate or under objects that are very dangerous to your home. The combination lock is perfect for home, emergency entry, vacation home, pet sitting