Cal Lock Patio Door Lock LocksOnline Product Review
https://www.locksonline.co.uk/Locks/Patio-Door-Locks-/CAL-LOCK-Doublex-Patio-Sliding-Door-Lock.html
This is a great lock to give you extra protection on the old style of aluminium patio doors from the late 80’s early 90’s. The video will give you the opportunity to see the product a little closer. You will also see a small key that allows the lock to be locked into position.
Most of the old Patio Doors, the locks have seen better days, and there are not many locks now available to replace the original lock. This lock and sometimes two can be fitted, may mean you can still use your patio door for years to come.