This pen core rod has everything you need to to rotate your pen.Including 7 mm drills, core shafts and live -core shaft protectors. The live core shaft protector allows you to connect the core to the tail seat without excessive tightening or excessive tightening. The core slides through the central hole of the nose in the center of the living center, so the installation and adjustment are fast and safe. A perfect tool, to damaged core shafts and outer round pen blanks by applying directly pressure penbles instead of core shafts., Manufacturer: Akfldms