Pen Barrel Trimming System By Peachtree Woodworking PW7116 Square the end of your pen blanks and pen tubes prior to turning Cleanly remove excess glue from inside your pen tube and blank Cutting shafts will mount into a drill chuck, latth chuck, drill press or hand drill The 3/4" square end cutter will handle just about and size pen blank Includes; 7mm, 8mm, 3/8" and 10mm pilot shaft, 3/4" square end cutter & wrench & sleeve adaptor