| 摘要 |
A ratchet wrench includes a handle and an annular head from which the handle projects. The annular head defines a first space, a second space communicated with the first space and a third space communicated with the second space. An annular gear is rotationally put in the first space. The annular gear includes a toothed external face. A direction controller is put in the second space. The direction controller includes two pawls and a spring installed between the pawls. Each of the pawls includes a toothed face. The direction switch is rotationally mounted on the handle and partially put in the third space for bringing the toothed face of selective one of the pawls into engagement with the toothed external face of the annular gear.
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