Large and Safe Storage: The large combination key box has enough capacity (approximately 4.5 x 3.7 x 2 inches inside) to hold home, office or business keys. company. Other large car keys; you can alsostore it if necessary. Small things, like credit cards, ID cards, etc. Two unlocking methods: This password safe has a 4-digit password and an emergency key; it allows you to define up to 10,000 combinations. You can set your own password and change it regularlyfor added security, making it difficult to decipher. If you forget your password, the recovery key will be more useful to you Easy Installation: Make sure the key box can be installed on any solid surface. Drill the box into the wall at a higher cost with no hassle or extra work. SOLID CONSTRUCTION: Our wall mounted key box is made of sturdy aluminum alloy, which is waterproof, corrosion resistant and weather resistant. Ideal for outdoor installations. Wide Application: This large outdoor key box can be widely used in home, garden, office, etc. Will be a great help in any occasion. It allows you to keep and protect your car keys while you surf,rather than risk hiding them under sand/rocks etc.