The Roto H650 2003432 has a central latch and deadbolt with four V-cams. This supplied version has a 35mm backset, 92mm PZ centres and a 16mm faceplate.
Operation: lift the door handle to engage the additional locking points and central deadbolt, then turn the cylinder key to block the mechanism. Unlock with the key before lowering the handle to retract the locking points and latch. This is manual lever-operated locking, not automatic locking when the door closes.
Replacement fit: match the exact order reference and revision, backset, 92mm PZ centres, 16mm faceplate, case routing, locking-point positions and profile-specific frame keeps. Matching the brand or PZ centres alone does not make this a direct replacement. The stored range manual explains installation and operation; it is not proof of every older order-code dimension.
Exact catalogue reference: Roto lists 2003432 as the 35/92, 8mm follower, 16mm faceplate four-V-cam version with V22/25 locking pattern. The stored catalogue pages show the locking-point layout and main-case drawing. Compare these with the existing unit before replacement; a catalogue sash-rebate-height range is not the physical strip length.