Abstract: A die set consisting of three separate dies is disclosed, with the first die having thread forming ridges on both sides thereof and both sides being flat, i.e., the contact surface areas thereof lying in a single plane to engage a flat, planar die support surface in the die holder. Each of the second and third dies is a single-face die with a flat, planar rear face to engage the die holder, and the working face of each of the second and third dies includes a longitudinally tapered portion and a parallel dwell portion for final finishing of the workpiece. This effectively doubles the die life for only a fifty percent increase in die material. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.