The 856 series features lift lever operation. It differs from the 859 series which has split spindle nightlatch operation. This lock is a standard length version of the 4 roller Type 1 lock.
- Overall length - 2170mm
- Distance between outer rollers - 1510mm
- Distance between inner rollers - 699mm
- Undo the screw in the side of the lock case adjacent to the latch. Remove the latch, reverse, reinsert and repace the screw.