This key storage numeric lock box which hangs easily on any doorknob, fence, railing or pipe. Just open the key box, lift the shackle and hang. No tools are necessary. With its large body, it is designed to hold multiple keys, key fob, and/or key cards. The back of the lock box is designed with a rubber bumper to protect it from damaging doors or wherever it may be placed. With a 4-digit combination that can be set or reset at any time, this lock box is not only well constructed and designed, it also provides a secure way for you to lock up your keys or other valuables