Made of aluminum alloy material, low density, good thermal conductivity, good corrosion resistance and high strength 4-digit combination lock for security and hole for 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, includes all necessary mounting hardware to ensure the box can be mounted on any sturdy surface Suitable for outdoor use, after school children, cleaning or maintenance services, resort properties and elderly care providers Specification: Condition: 100% New Color: silver + black Material: aluminum alloy Dimensions: (L) x (W) x (H) 116 x 94 x 38mm / 4.53" x 3.74" x 1.50" Packing list: 1x wall-mounted key storage lock+1xiron plate+1xscrews+nuts+1xexpansion tube