These Lockmaster genuine slave gearboxes have either a single or double 8mm spindle with no latch or deadbolt. Operation: Lift lever or Double SpindleLockmaster Centre Case Slave Lock£51.00PriceBackset Size*SelectQuantity*Add to CartTech Specs Case Height: 228mm Case Width: Backset + 16mm Centres: 92mm or 62mm/92mm Backset: 35mm Spindle: Single or Double 8mm