Page 35 - Group 4
P. 35

Lesson 48


        We all need to use a screwdriver from time to time

        and the photo shows a power screwdriver together
        with a huge number of screwdriver heads. This is a

        particularly  useful  tool  when  you  have  a  couple  of
        dozen screws to insert into wood.




























        When I was a kid in the 1960s there was only one type
        of  screw  head,  a  straight  cut  and  you  would  use  a

        spade headed or flat ended screwdriver. Then I saw

        the appearance of the Philips screw that had a four
        star slot in the screw head. All in all this was a better

        design than the straight cut screws.


                                          30
   30   31   32   33   34   35   36   37   38   39   40