In the arrangement of FIG. 9, the set screw 98??? is between the two pins 32??? and 34???.The head 31 of the tool 10 is made of steel, stainless steel, brass, aluminum or a polymer material, such as polyamide which may be filled with glass fibers, or another polymer material of a strength sufficient to make a tool.From the foregoing description, one skilled in the art can easily ascertain the esse