Wide range of applications: This is a good combination key box for storing keys and bank cards etc. It can be installed in your home, office, warehouse, vacation home or wherever you need it. You can share spare keys with friends, family, neighbors and caregivers. With this lockable outdoor key safe, you don't have to worry about keys hiding under the carpet. HIGH SECURITY: Our wall mounted key safes are made of an alloy body of high quality aluminum and a durable steel locking mechanism to provide additional resistance to the exterior key box against hammering or puncturing. Weather-resistant metal material protects your keys and cards. Reliable 4-bit combination: Use 4-bit combination for powerful protection. The 4-digit password safe offers up to 10,000 different password combinations, which are much harder to crack than the 3-digit model. Easily redefine the desired combination at any time to protect your valuables. (Note: take a picture/write it down to save your code ) MINI SIZE AND EASY TO USE: Exterior dimensions (H x W x D): 3.7 x 2.95 x 1, 37 inches, Interior dimensions (H x W x D): 3.2 x 2.75 x 1.1 inches. Equipped with a palm-sized key safe to store multiple keys, it is ideal for daily business, friends, relatives, home services, pet sitting, real estate business, etc., rentals, etc. EASY INSTALLATION: Install in 4 simple steps: Outline screws Drill holes Nail expansion pins Install box with screws. You can give this external combination key box as a gift to parents living alone or renting children for their convenience. Scope of delivery: a gray key box.