Enhance Your Performance with the GU New Style Fast Locking Gearbox The Fast Locking Europa Plus GU gearboxes are offered exclusively in a 35mm backset. You can identify new style GU locks by the distinct shape at the top of the gearbox: old-style locks have a cut corner, while the new versions feature a vertical groove designed for handle bolts. It's important to note that these two types are not interchangeable; a new-style gearbox will not fit an old-style multipoint lock. Additionally, Fast Locking Europa Plus gearboxes are unique to the new style and differ slightly from other gearboxes, featuring an elongated hole in the top groove. GU multipoint lock gearboxes come with a latch and deadbolt, measuring 191mm in height (not including fixing lugs), with a width of backset + 16mm. The latch is 32mm tall, the deadbolt is 35mm tall, and theres a 54mm distance from the bottom of the latch to the top of the deadbolt. Each GU gearbox is secured to its faceplate with three screws: th