【High security】 : Our combination key case is made of solid aluminum alloy which is waterproof, corrosion resistant and weather resistant. Ideal for outdoor installations. A protective cover protects the combination dial from unpredictable weather conditions. 【Large capacity】 : The capacity of the outer large key box is large enough (the inner size is about 11.5 x 8 x 4.3 cm), so it can accommodate house keys, office keys or other large car keys. If necessary, you can also store some small items such as credit cards, ID cards, etc. 【Two unlock modes】This key safe has a 4-digit combination and an emergency key; you can define up to 9,999 combinations. You can set your own password and change it regularly to increase security and make it harder to crack. If you forget your password, a backup key may be more convenient! 【Wide application】 : This large combination key safe can be widely used in home, garden, office, etc. It will be a great help on any occasion. With it, you can keep your