The Mag Lock™ Magnetic Locking System is hidden inside the cabinet. Once installed, it cannot be opened without using the powerful Magnetic Key. It can be used to secure cabinets, cupboards and drawers. Great for use in every room of the home. This product is also great for grandparents, as the lock can be disengaged using a special disengaging clip when grandchildren are not around. It can be installed through most materials including wood, plastics, laminates and ceramic tiles.