Patent ID: 6889584

Claim:
A wrench comprising: a cylindrical main shaft comprised of a first divided body having a working portion and a second divided body having an operating handle extending from a portion of the second divided body, wherein the first and second divided bodies are connected so as to be capable of rotational movement relative to each other; a torsion member having a first end, a second end and a twist portion between the first and second ends, said torsion member being inserted in the first and second divided bodies of the main shaft, and providing an elastic restoring force about the axis of the main shaft upon twisting the twist portion by torsion applied to the second divided body, wherein a first end of the first divided body is fixed to the first end of the torsion member, and a first end of the second divided body is fixed to the second end of the torsion member; a cylindrical member rotatably disposed on the second divided body; and torque display means for displaying the torque produced in accordance with the degree of twist of the torsion member with respect to a reference point.