This is a kit of 10 magnetic cabinet locks complete with one magnetic key. As you can see from my video, they mount with no screws, using 3M mounting foam tape, to the inside of cabinet doors and drawers and are unlocked by holding the magnetic key on the outside of the door in the proper spot. These arethe same locks used in hidden gun cabinets, etc. They are absolutely essential in a home with children, to keep them out of the cleaning supply cabinet. A very nice set. My only wish is that it would have come with a second key, in case of emergency.