Fullex XL Replacement Gearbox – 35mm Backset 92mm Pz Single Spindle For uPVC & Aluminium Doors The Fullex XL centre case gearbox is the mechanism inside your uPVC door that is operated by the handle. It is the part most likely to fail when a multipoint door lock stops working. Replacing just the gearbox is far more cost effective than buying a complete new lock. The centre case re-attaches to your existing locking strip.
eBay