Matching the mechanism is more than matching its length
Multipoint systems can differ in their gearbox, fixing positions and locking-point arrangement. A clear photo of an accessible door edge may help identify the system, but do not remove a strip to obtain it. The inspection also considers the hinges and keeps: fitting a compatible mechanism into a misaligned door may leave it under avoidable load.
The assessment for multipoint lock repairs & replacements
Diagnosis considers the gearbox, strip, keeps, hinges and door alignment. Replacement parts are matched to the door rather than selected by appearance alone.
Information to prepare
Tell us if the handle lifts, the key turns and the locking points engage. A photo of the door-edge strip can help identify the mechanism.