| 摘要 |
A wrench assembly consists of a handle and a wrench. The handle includes a head. The wrench includes a first gear non-rotationally put in the head of the handle, a second gear rotationally installed in the first gear for engagement with a tool bit and a one-way driving device arranged between the first gear and the second gear so that the first gear can drive the second gear in a direction through the one-way driving device.
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