Made of aluminum alloy material with low density, good thermal conductivity, good corrosion resistance and high strength. A 4-digit combination lock ensures security, and the hole can store up to 5 keys. It has a powerful button code on the box that allows the person you tell the code to access your keys. Easy to install and includes all necessary mounting hardware to ensure the box can be mounted on any sturdy surface. Ideal for outdoor use, children after school, cleaning or maintenance services, resort properties and elderly care providers. Specifications: Condition: 100% New Color: Silver + Black Material: Aluminum Alloy Dimensions: (L) x (W) x (H) 115 x 95 x 38mm / 4.53" x 3.74" x 1.50" Package includes: 1x Wall Mount Key Storage Lock 1x 1x Mounting Screw Pack English Instruction Manual