Uses of screw driver

To Study the Electrical wiring tools.

1.Screw Drivers.

i) It is used tor loosening and tightening the wooden or machine screw
ii) The size of the screw driver depends on the length of Its blade or shank.

iii) It is made of carbon steel and has a hardened and tempered edge.
iv) It 18 available in different sizes such as 100mm,150mm, 200mm, 250mm etc

Types of screw drivers :

a) Flat screw driver
(Light and   heavy doty)

b) Ratched screw driver

C) Carpenter screw driver

d) Philips screw driver

e)  Double ended offset screw driver

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