| 摘要 |
A linear driver has a drive stem having a first end and a second end and a handle fixed the drive stem so that the drive stem first end extends into a first end of the handle. In order to increase the torque the user may apply to the driver , the driver includes a thumb plate fixed when in its operating position with respect to the drive stem so that the thumb plate extends radially outwardly from the handl e at the handle first end so as to permit its engagement by the thumb of a user. The thumb plate may be selectively retractable into the handle when not in use in certain embodiments of the invention, while, in others, the thumb plate remains fixe d in its operating position.
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