A wrench for holding machine taps or reamers and the like can be easily made of a piece of flat steel and two machine screws; if steel is not handy, iron can be used. Take a piece of stock of about 3/8 x 1/4 inch, and cut off two lengths of. 5 inches each. Near the end of these pieces and about 1 inch apart, drill two holes; 1/4-inch tap holes in one and clearance holes in the other. Centrally" between the holes file V-shaped grooves about 1/16 inch deep. Tap out the holes, and assemble the parts, using round-head screws of 3/4 inch length. The ends of the wrench should be rounded for convenient handling. The dimensions herein given can of course be varied at will. Any size from the smallest to the largest can be made in this way.

Fig. 110 - Handy tap wrench.