| 摘要 |
In order to enhance the effectiveness of a tool for driving a fastener in a clockwise and/or counterclockwise direction, the tool includes a fastener engaging portion (12), a rotational movement imparting portion (14), and a releasably retaining portion (16). The fastener engaging portion (12) is adapted to matingly engage a fastener for clockwise and/or counterclockwise driven movement in response to rotational movement of the fastener engaging portion (12). The rotational movement imparting portion (14) is adapted to impart rotational movement to the fastener engaging portion (12) to thereby impart driven movement of the fastener in the clockwise and/or counterclockwise direction. The releasably retaining portion (16) is adapted to releasably retain the fastener engaging portion (12) in operative relationship with the rotational movement imparting portion (14). In addition, the releasably retaining portion (16) transmits rotational movement in a direct and positive manner and includes an expandable/contractible spring (18) for releasably gripping the fastener engaging portion (12).
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