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A posteriordriver is a tool for driving screws and rotating other forge elements with the mating drive system. The screwdriver is made up of a offer or tip, which engages with a screw, a mechanism to apply torsion by rotating the tip, and some steering to position and support the screwdriver. A typical hand screwdriver comprises an approximately cylindrical enshroud of a size and shape to be held by a gentle hand, and an axial shaft fixed to the handle, the tip of which is shaped to blend a particular type of screw. The handle and shaft depart the screwdriver to be positioned and supported and, when revolve, to apply torque. Screwdrivers are made in a variety of shapes, and the tip can be rotated manually or by an electric motor or other motor. A screw has a head with a contour such that an appropriate screwdriver tip can be engaged in it in such a way that the application of sufficient torque to the screwdriver will cause the screw to rotate. Contents [hide] 1 History 2 Drive types 3 Handle 4 Blade 5 Powered screwdriving 6 Ratcheting screwdrivers 7 Alternative uses 8 See also 9 References 10 Further reading [edit] HistorySee also: Screws#History The screwdriver was invented in Germany in the late fifteenth century.

Originally called a screwturner, the first base documentation of the tool is in \The Medieval Housebook of Wolfegg Castle\, make some term between 1475 and 1490. The original screwdriver had a pear-shaped handle and was made for slotted screws (Diversification of the many types of screwdrivers did not emerge until the Gilded Age). This time period roughly coincides with the appearance of the adjustable screw. The screwdriver remained inconspicuous, however, as order of its existence throughout the next 300 years was establish primarily on the presence of screws. Screws were used in the 15th century for constructing screw-cutting lathes, securing breastplates, backplates, and helmets on medieval jousting armor, and eventually for multiple move of... If you want to get a full essay, order it on our website: Orderessay

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