Protable Design - Free of InstallationSimply hang the key safe with its removable shackle - cannot be opened only when you open the key safe - on doorknob. fence. railing etc. Suitable for Outdoor & Indoor UseWeatherproof rust-resistant steel. Heavy duty zinc alloy and steel offers extra resistance to cutting. hammering and sawing. Secure Storage Capacity Suitable for up to 5 house keys. Prevent lock-outs and provide access to your property by health aides. service technicians and pet sitters when you are at work or on vacation. Perfect solution storing keys for Airbnb rentals. 4-Digit Combination DialsIt offers up to 10.000 combination possibilities. Attached hinged cover allows for 1-handed operation. Clear instructions guide you to re-set your access code at any time. Please note that once the password is reset. it is best to take a photo to record or it will have no way to open again. Double-Walled ConstructionFlush-mount and impact-resistant access cover is impervious to hammering. sawing or prying. Confidently place the keys in Diyife heavy duty key lock box.