About this item 1.[High security and durability]: Outdoor key box is made of high-strength and rust-proof aluminum alloy, which makes it strong enough to resist rust and corrosion. In addition, it can withstand hammer blows, saws and prying. The key safe has a sliding rubber cover that protects the combination button from the weather. It is waterproof, snowproof and dustproof and has a long service life. 2.[Ideal Capacity Combination Box]: Wall mounted key cabinet has been upgraded with secure storage space (internal dimensions approximately 3.7in x 2.6in x 1.4in (L*W*H)) to hold up to 5 keys or 3 large keys, or for storing small car keys, credit cards, ID cards and other small items. 3[4-digit free combination]: The key box with code is a combination lock with 4 dials