Reshaping And Tempering A Screw Driver

1. Heat about 3 in. of the end of the screw driver to a cherry red. •

2. Place it on the anvil, and hammer it on one side and one edge to the desired thickness and width.

3. Grind or file the end back to make it square or at right angles to the sides, as shown at B, Figure 137.

4. File the sides at the end to a shape as shown at D, with the sides parallel for about V$ in., and as thick as the width of


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