The control proves to be mechanically strong and rigid by testing and a hand electric drill equipped with it can be used as motordriven tap wrench screwdriver etc.

经测试，机械特性硬，手电钻配上此控制器后，能作电动 攻丝、 板 手、螺丝刀等作业，实现一机多用。

Therefore the overthread screw tap can be matched with a pneumatic wrench having regular hexagonal holes via insertion and the overthread screw tap has the advantage of high work efficiency .

其扭力段由正四棱柱形改为正六 棱柱形的，这样可以与有正内六角孔的风动 扳手相插配使用，有提高工效的特点。