DURABLE MATERIAL: Our digital key box is made of high-strength zinc alloy, solid steel and resists sawing, crushing and burglary. The key safes have a removable rubber cover that protects against dust, rust, sunlight, rain and snow. Lasts a lifetime, you won't have to replace your key safe due to the elements. Easy to Use: With all mounting hardware included and pre-drilled holes, it's easy to mount the Combination Key Safe on a solid surface. Just four steps to set and reset the 4-digit combination. Instructions are always included. Please know that you never forget your code. 4-DIGIT CODE COMBINATION: You can customize the digital code as you like, there are about 10,000 combinations, don't worry about others breaking it easily. The instructions for using the digital code key safe will guide you through every step and reset your passcode at any time. VALUE-PROOF: The small outdoor key safe is suitable for outdoor use. And environmental protection paint increases resilience. It also comes with a sliding door to hide and protect the dials from dust, rain, snow and ice during your daily use. WIDE APPLICATION: The key box with hanger is suitable for a indoor and outdoor use. It will bring you much convenience for vacation home, apartment entrance, emergency entrance, warehouse, garage, office, rental property, etc.