One of the most critical steps in turning top quality pens is squaring the ends of your pen blanks to provide a perfect, gap free mating surface for the pen kit parts. With the Whiteside Pen Mills, this step quick and easy. Proudly made in the USA, the Whiteside Pen Mill features a sharp, 3/4"-diameter carbon steel trimmer head for squaring blanks and pilot shafts that clean excess glue from inside the brass tubes. Pilot shafts and trimmer heads are sold separately, allowing you to purchase only what you need.