| 摘要 |
A wrench (10) comprises a casing and a rod (14). The rod has a driven portion (38), a driving tip (34), and a straight section (42) which extends therebetween. The driven portion has a clamped section (44), a rotating section (46) and a cantilever section (48) connected therebetween, the clamped section being securely clamped in the casing. The rotating section being rotatable between a free position and a biased position, wherein in the biased position the rod closes an electric circuit, thereby activating an indicator (32).
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