Pen Barrel Trimming System: includes 4 pieces of pilot cutter shafts in different sizes, 1 cutting , 1 sleeve adapter, and 1 hex key wrench, suitable for mounting into a drill chuck, lathe chuck, drill press, or hand drill, and they are helpful to polish, mill the hole and clean the inner tube with the tiny size Pen Turning Mandrel: the lathe mandrel is designed for producing pens, including a useful woodworking pen mandrel saver. Easy to set up, tightening the tail stock locks the mandrel, which can reduce the off center turning, the length of the shaft can be adjusted at will via loosening the lock nut at the stock end, which can also help you to improve work efficiency Suitable Size: shafts contain the sizes of 0.28 inch, 0.32 inch, 0.37 inch, 0.39 inches in diameter; The cutting measures about 0.75 inches in external diameter and 0.24 inches in inner diameter, and the "O" style sleeve adapter fits pilot shaft over 7 mm to keep it in the center position; Wood turning pen mandrel is 7.95 inches in total length, 0.24 inches in diameter, which is acceptable for most kits, can be applied for most lathes Quality Material: the cutter shafts are made of solid carbon steel, which is rust , sturdy, and , and the sleeve adapter is made of brass; The mandrel for the lathe is made of quality steel material, tough and sturdy, wear and high temperature , which can help to reduce vibration encountered when rotating Practical Pen Making Kit: this set provides practical and convenient tools for your pen blank preparation process, the cutting shafts can easily clean and remove the extra glue, bits of wood, impurities and more, from the tubes and make the tube cut flatter; Pen turning accessory is equipped with a bushing that can protect the mandrel from scratches The pen barrel trimming set canremove the dry glue in the pen barrel, and can also remove impurities in the pen nozzle, helping you to easily insert the pen mandrel. Pen turning mandrel helps any vibrations encountered when rotating the blank for a longer time than the necessary mandrel. This pen making kit includes pen barrel trimmer kit and pen turning mandrel with 7 mm drill bit, and the kit comes with barrel trimmer with shafts and drill bit in different sizes to fit your needs in your woodworking, helping you to improve work efficiency. Notes: Small parts are included, please keep away from children. Please make sure the cutting shafts mount into a drilling or lathe chuck correctly. Style:A Colour:Silver Material:Steel+carbon steel+brass Size: Pen mandrel Size:Total length:7.95 inches; Diameter:6 mm/0.24 inch Pen barrel trimming system size: Shafts:7 mm (0.28 inch), 8 mm (0.32 inch), 9.5 mm (3/8 inch), 10 mm (0.39 inch) in diameter Cutting :19 mm (3/4 inch) in external diameter, 6 mm (0.24 inch) in inner diameter Package Contents: 1set * pen turning kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.