Only remove the key from the lock once the retaining screw is secured back into place.
How to change a lock upvc door.
A few simple steps and tips for changing a upvc door lock in london 1.
A multi point locking mechanism this is normally a strip down the edge of the door with a few cases that sit inside.
Door locks and mechanisms can be purchased from upvc spares 4 repairs.
All you need to replace your old upvc mechanism with a new central gearbox is a screw driver or drill and a spare 5 minutes.
A video tutorial on how to replace a full length door lock on a upvc or composite door.
As long as you have selected the correct size central gearbox you will have no difficulty in changing it over.