| 摘要 |
An impact wrench (1) having a handle (3), an arm (7) pivotally connected to the handle (3) and of unitary construction with the handle (3), and a key (11) on the arm (7) for coupling with a keyseat of a wrench tool, such as a socket of a socket wrench. An impact surface (2) is located at an upper end of the handle (3) and has an impact-resistant cap (5). In use, a socket is fitted to the key (11) and placed into engagement with a nut or bolt which needs to be loosened. Striking the cap (5) with a hammer in the direction of arrow 17 causes rotation of the arm (7) and the socket and for the nut or bolt to loosen.
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