The 2 roller, 2 mushroom GU lock features rollers for compression and mushrooms for extra security.
The 28mm backset version features a black plastic gearbox.
- Overall length - 2285mm
- Distance between mushrooms - 1610mm
- Distance between inner rollers - 670mm
- Bottom deadbolt to spindle - 660mm
- Push a flat bladed screwdriver into the small rectangular slot above spindle and pull out latch at same time. Reverse and reinsert.