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Pen Barrel Trimming System includes 4 pieces of pilot cutter shafts in different sizes 1 cutting head 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 head stock end which can also help you to improve work efficiency Suitable Size the pilot shafts contain the sizes of 028 inch 032 inch 037 inch 039 inches in diameter The cutting head measures about 075 inches in external diameter and 024 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 795 inches in total length 024 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 resistant sturdy and durable and the sleeve adapter is made of brass The mandrel for the lathe is made of quality steel material tough and sturdy wear resistant and high temperature resistant 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