Turn more accurate, consistent, and concentric pen barrels with this one of a kind Mandrel system. The turn between centers Mandrel system rides on 2 centers rather than a typical rod, resulting in more dead on turning. There is No Mandrel shaft to bend so your turned barrel will eliminate an out of round blank, producing a blank that mates precisely with your pen parts. The system includes a #2MT headstock insert and a live #2MT Tailstock insert. Each insert has a 7mm pin. Mount your bushings onto the pins, mount your pen blank, then bring the Tailstock forward to secure your blank between centers. Ideal for single tube pen styles. For #2 Morse taper lathes. Patent pending.