Lock "Tongue" Domus rectangular, cylinder 83mm with 3 keys, chrome finish, is the ideal solution for aluminum profiles. Features: - Easy conversion of the upper tongue to right or left. - Distance face/center lock: 35 mm. - Distance center of knob hole/center of lock: 85 mm. Replacement instruction: - Measure from the face of the lock to the center of the cylinder where the key goes in. - Remove the knobs by unscrewing the screws below the rotating base. - Unscrew the cylinder screw and remove the cylinder. - Unscrew the end screws of the lock and remove it from the door. - Install the new lock by first screwing in the end screws. - Reinstall the two knobs and the cylinder rosette.