Notice: Each lock has different keys from other locks, they are not keyed alike locks.Sliding glass door lock and keys. Made of metal for windows and doors / cabinets / counter move switch, safe and convenient.Easy to use and simple to set up lock makes any counter safe and lockable, fits up to 13mm thick metal, wood, sliding glass, showcase doors.Includes a bar, the locking barrel (mechanism) and 2 keys.Suitable for an array of reptile housing or glass display cabinet/showcases Metal construction.Instructions: The bar slides between the panes of glass and is secured in place with a screw, the barrel then slides onto the bar and ratchets into place.