| 摘要 |
A ratchet wrench includes a wrench head, a ratchet assembly and a bushing. The wrench head is made of metal and defines a cavity therein. The ratchet assembly is disposed in the cavity of the wrench head and has an outer configuration corresponding in shape to a periphery of the cavity of wrench head and being slightly smaller than the cavity of the wrench head. The bushing is made of a metal with a hardness greater than that of the wrench head and is fitted in a clearance defined between the ratchet assembly and an inner wall of the cavity of the wrench head. Moreover, the bushing has a substantially consistent thickness so that the bushing has an outer periphery and an inner periphery both corresponding in shape to the periphery of the cavity.
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