QUICK AND EASY TO INSTALL: The lock and keys come with a mounting plate to protect your fragile glass. No need to drill a hole for quick and easy installation. Easily slides over the edge of your glass door. SINGLE KEY SYSTEM: No two keys are the same, and each lock is unique. If you have more than one set of locks, each key is unique to that lock. This key system fits a glass door up to 5-8mm thick and attaches easily to most display cases. PROTECT YOUR COLLECTORS: Whether you have a nice cup of tea or other collections, you can use this lock to protect them from children, guests, or anyone else so nothing gets damaged, lost, or stolen. This lock is ideal for retail and home applications. Any retail store with a display case will find this security lock a great addition to their business. Excellent solution: Adds style and security to stereo cabinets and glass-door display cases. Protect your delicate and sensitive treasures and collectibles with this lock. No one but you has access