For use in repairs on small trucks, vans and tractors. With 3/4" square drive (20 mm). Ratchet mechanism and change from right to left gear. Sturdy steel shaft with optimum rust protection: 2x nickel-plated, then matt chrome-plated. Calibrated piece by piece and finally tested (with test certificate). Tolerance according to ISO 6789: +/- 3 %. Clearly legible analogue display with additional micro-scale for fine adjustment. Total length 820 mm. Packed in a practical plastic case.