The Fullex XL dual-spindle latch and hookbolt centre case is available as 35mm and 45mm backset versions with separate followers at 92mm and 62mm PZ.
Dual spindle means two separate follower positions. It is not an inline split-spindle mechanism; outside access depends on the matching furniture and spindle arrangement.
Replacement fit: compare the exact case version, backset, follower arrangement, fixings, latch/bolt positions and drive connections to the locking strip. Matching the brand or PZ centres alone does not establish interchangeability. A gearbox repair retains the existing strip and keeps only when those parts remain serviceable and compatible.
Case revision: the stored manufacturer drawings show a 227mm case height; the supplied catalogue specification is 228mm. Confirm the delivered case outline and fixing positions against the original before ordering. Use only the drawing labelled for the correct backset and spindle type.
Security performance depends on the complete doorset and its specified lock, keeps, cylinder, furniture and installation. A range-level approval does not establish a separate Secured by Design or PAS 24 certification for a loose replacement gearbox.