Sliding glass door ratchet lock (40pcs). Keyed alike- one key can fit all. Zinc alloy housing 2 keys per lock fits glass up to 1/2″ thick up to 1/2″ thick without drilling. Locks come with set screws and a cushioned lining to hold them securely to the glass. Ratchet arm length is 5. Lock width is 1/2. Handle height is 1. Cylinder diameter – 13/16 wide.