The GU 3000 ProLock Long is a lever operated multipoint lock system with a 35mm backset, 92/62 centres, a 16mm wide faceplate, 2 hooks and 4 rollers. It can be operated by lifting the lever to engage the locking mechanisms and turning the cylinder fully, thus locking the unit. One full turn of the key followed by a downward push of the lever will unlock the system when locked.