screwdriver

Screwdriving, used for tightening and loosening process, which can be changed according to the shape of the tip of the screw device. Overall ends and the middle part (to be strong) metal, and the handle portion (in terms of ease of hand-held) is made of plastic. Charged species which carries a battery at the ends and has the feature of being interchangeable. The origin of the name comes from the Italian word torno-vite.