The 856 series features lift lever operation. Look out for the 859 series which has split spindle nightlatch operation. This Type 3 lock features 2 rollers and 2 hooks.
- Overall length - 2170mm
- Distance between hooks - 1491mm
- Distance between rollers - 699mm
- Distance between hooks - 1015mm
- Undo the screw in the side of the lock case adjacent to the latch. Remove the latch, reverse, reinsert and repace the screw.