YALE Doormaster Lever Operated Latch & Hookbolt Twin Spindle Gearbox To Suit LockmasterA Yale door master twin spindle lever operated latch and hookbolt gearbox with 92 62mm centres to suit Lockmaster. This is the new version with the round hole "push to snib" feature. If the centre case is being used for a replacement with a snib handle; the handle spindle will still pass through the round hole but wont be needed to activate the snib you just push the latch head in. Euro profile lock case Latch & hookbolt Centre Gearbox Only Twin