2.This is done so that the blank is flat on both ends and to make sure the brass tube meets with the bushings in a clean true manner. 4.When using a hand drill or drill press, it is recommended that you use a pen centering vise (not included) to help secure the pen blank. It also helps to use a pen centering vise for better accuracy when drilling with the Pen Trimmer. 3.This kit provides you with an added bonus as cutter shaft cleans out any left over glue that may have been left behind during the glue up process. This pen trimmer kit can be used on a drill press, with a hand drill or with your own shop made handle if so desired. 1.If you love to turn pens or are considering taking pen turning up as a hobby, then this kit is a must for your pen blank preparation process. Typically after you have glued the brass tubes into your pen blanks and the tube is completely dry, it is common practice to clean up, square and trim the ends of the blanks. 5.If you are using a hand drill, we recommend securing the blank into a workbench vise if a pen centering vise is to you. The kit includes 3/4 inch cutting Head, 7mm, 8mm, 3/8 inch, 10mm Pilot Cutter Shaft, 0 Size Adaptor Sleeve and a Hex Key Wrench for the cutting head., Weight: 0.72532084198 pounds, Manufacturer: Yoeruers