CHARNWOOD Pen Turning PENBTP Pen Barrel Trimming Shafts for 10mm, 3/8 & 27/64 This kit comes with 8.64mm, 9.15mm & 9.9mm trimming shafts to suit 3/8, 10mm & 27/64 Tubes. Simply use these shafts in conjunction with the cutter head from our P…View more