Patent ID: 7146883

Claim:
A wrench, comprising: a wrench body having an end provided with a drive head having an inside formed with a mounting recess having a side formed with a receiving recess connected to the mounting recess; an actuating member mounted in the mounting recess of the drive head; a pawl member pivotally mounted in the receiving recess of the drive head and engaged with the actuating member, the pawl member having a side provided with a pivot portion; a direction control knob rotatably mounted on the drive head and having a shaft extended into the receiving recess of the drive head, the shaft of the direction control knob having a driving slot; a driving member having a driving portion having a first end including a pivot pivotally connected to the pivot portion of the pawl member and a second end inserted into the driving slot of the shaft of the direction control knob so that the driving member is moved by the shaft of the direction control knob to control movement of the pawl member; and at least one positioning device connected to the drive head and located corresponding to the direction control knob or the pawl member.