Patent ID: 8156845

Claim:
A wrench, comprising: a driving head, having a moving portion disposed at an end of the driving head, an axle hole formed at another end of the driving head, an accommodating portion concavely disposed on a side of an internal wall of the axle hole, and two adjacent pawls accommodated in the accommodating portion and separately and elastically abutted by a first elastic element and having a clamping force towards the axle hole; a control ring, contained in the axle hole, and having a connecting end extended upwardly out of the axle hole and coupled and linked with a wrench handle, and a ratchet section and a smooth section defined on an external circumferential surface of the control ring, and the ratchet section of the control ring and the two pawls being latched to the control ring to define a fixed state; a prop column, passed into the control ring, and an end of the prop column being extended upward and passed out of the connecting end of the control ring to form a press portion, such that a user can use the press portion as a fulcrum to apply a force to move the wrench handle and the control ring with respect to the driving head, and the two pawls are pushed by the smooth section of the control ring to release the fixed state of latching the ratchet section of the control ring.