This is a Lockmaster replacement 35mm gearbox with latch and deadbolt that is found on locking mechanisms on UPVC, Timber and Composite doors. The central gearbox is the most common part that is likely to break on a upvc lockstrip. This can be replaced by simply unscrewing it from the strip and replacing it with the lock case saving both time and money. This gearbox is a 35mm Backset, measured from the centre of the square spindle hole to the front edge of the lockcase, they also have a fully reversible latch allowing use on both left and right hand doors. Features 35mm Backset (measurement from face plate to centre of spindle) 92mm Centres (measurement from centre of lock cylinder to centre of spindle) Centre deadbolt Very simple and quick to fit
