Yale YS170 genuine gearbox features a latch and hookbolt. 

Available with a 35mm or 45mm backset.

Operation: Lift lever or split spindle

Latch reversal: Push up the serrated button on the side of the case, remove the latch, reverse and reinsert.

• Case Height: 217mm
• Case Width: Backset + 18mm
• Centres: 92mm
• Backset: 35mm or 45mm
• Spindle: Split 8mm