This Lockmaster genuine gearbox features an 8mm double spindle with 62/92mm centres and a 35mm backset. Double spindle gearboxes are unsprung and therefore not suitable for use with unsprung handles.
Operation: Double spindle
Latch reversal: Undo the screw or screws (depending on the model) in the latch to remove. Reverse, reinsert and replace screw(s).