This is a spare key hider that looks and functions as a hook! Mount it somewhere on the wall using 2 screws or 2-sided tape, place your spare key in it and hang something from the hook to hide it. Never be locked out again!!
This should be a snug sliding fit and may not need magnets but I included the magnets to give it a little more security. The magnets are 5mm wide by 2mm thick magnets.