Fits 1/4" (6 mm) Glass Anti-Spread Housing Chrome Plated Finish CRL "Tamper Proof" Sliding Glass Door Locks fit any sliding all-glass door, many wood and metal doors, too. They're easily attached - you don't need tools. Durable construction, finished in rustproof chrome, they''re completely tamper proof. Ratchet bar insures close adjustment of lock position. For overlaps of 3/4 to 3-3/8 inches (19 to 85.7 millimeters). Bar width is 5/8 inches (15.9 millimeters). Color: Chrome Minimum Order: 1 Each If ratchet bar fits loosely on glass you may slightly compress it to grab on to 1/4" glass. Important Note: Locks are keyed randomly