Screwdriver (Screw Driver) as a tool for tightening and loosening screw type head cut. The size and shape of the screwdriver is designed according to the characteristics of work, such as a screwdriver used for King's GEM (Jeweler s Screw. 'Screwdriver, used in the hard work of mechanic design petiole is the square to make use of a wrench or vise Khan to increase tension in twisting. Screwdriver screwdriver to greater consists of main components 3 parts
.1. Screwdriver handle (Handle)
2. Stem screwdriver (Blade or Ferule)
3 mouth screwdriver (Tip)
.
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