When a vehicle assembly line must fasten dozens of bolts inside an engine block or behind a door frame, the limited reach of a standard screwdriver can force the operator to reposition the workpiece, extending cycle time and increasing the risk of mis‑alignment. The expansion module fits onto a Wera tool system, providing a compact yet sturdy extension that brings the driving element into tight, recessed locations without altering the tool’s ergonomics. By inserting the module, technicians can maintain a consistent hand position while the extension slides the torque‑transfer head around obstacles, allowing rapid completion of fastening steps on chassis sub‑assemblies, power‑train mounts, and interior trim installations. Its quick‑connect design also supports fast tool swaps during shift changes, so the same workstation can service different vehicle models without extensive re‑tooling. In a secondary application, the module proves useful on test‑bench rigs where sensors or prototypes need temporary fastening points that are otherwise out of reach, keeping the test flow uninterrupted. This flexibility helps keep the line moving and reduces unnecessary handling of heavy components.