The must have peace of mind accessory for any parent or grandparent, the Tot-Lock. This security device is one-of-a-kind with powerful magnetic locks that can attach to wood, glass, metal, and particleboard cabinets for a guaranteed safeguard from curious little hands. To open the cabinet, simply hold the magnetic key against the cabinet door to disengage the lock. The Tot-Lock also features a patented unlocking device that allows a disabling of the lock so cabinets can be opened without the key. Key sold separately.The lock will install on thickness of 1/2" (13 mm) to 1-9/16' (40 mm) and operate through wood, glass, metal and particle board.