Quick and easy to install: The lock and keys come with a mounting mat to protect your fragile glass, and you don't need to drill a hole, so installation is quick and simple. It slips easily over the edge of your door glass. Unique key system: the keys are not identical, and are unique for each lock. With more than one lock, each key will be unique to this lock. This key system suitable for door glass up to 5-8mm thick, easily attaches to most retail display cases. Protect your collectibles:If you have a beautiful antique or vintage tea cup, or other collectables, you can use this lock to protect them from children, guests or other people, so that nothing is damaged, lost or stolen. Great for Business: This lock is perfect for business and home retail applications. Any retail establishment with display cabinets will find this security lock a great addition to their businesses. Exceptional solution: add style and security to stereo cabinets and display cabinets with doors