GU

GU Old Style Gearbox 45mm Backset A replacement centre case gearbox for the GU old style 45mm backset multipoint door lock mechanism. If you're having problems with your door lock, the gearbox is...

 GU Door Lock Gearbox New Style 45mm Split Spindle A replacement door lock gearbox for the GU New Style split spindle door lock mechanism with a 45mm backset. If you're having problems with your...