| 摘要 |
A selective one-way wrench includes a handle, an annular head, a gear, a direction controller and a direction switch. The handle projects from an annular head. The annular head defines a first space and a second space communicated with the first space. The gear is rotationally put in the first space. The 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 includes a first element installed rotationally on the handle and a second element put in the second space and operably connected with the first element 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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