螺钉旋具，也常称作螺丝起子、螺丝批、螺丝刀或改锥等，是用以旋紧或旋松螺钉的工具。主要有一字（负号）和十字（正号）两种。
旋具 中文名称: 螺钉旋具 十字槽螺钉旋具 英文名称: Screwdrivers -- Screwdriver for cross-recessed head screws 中标分类： J47 ICS分类： 25.140.30 标准分类编号：
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本发明属五金工具领域，是一种能对孔进行攻丝的螺钉旋具。
The invention discloses a screwdriver which can tap the hole, belonging to the field of hardware tools.
目前，在机械加工工厂里，螺钉旋具和丝锥是较为常用的两种五金工具。
At present, screwdriver and screw tap are hardware which is often used in machining factory.
为更好地完成功能，本发明所提供螺钉旋具的旋柄上还设计有加力装置。
To have better function, the rotating handle of the screwdriver is provided with a force applying device.
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