Whiteside 9012 Pro Pen Mandrel, #2 MT incorporates advanced technology similar to that found in modern CNC machines, featuring a hollow Morse Taper and Collet design for superior holding power and quick, easy adjustments regardless of pen length or style. This user-friendly system allows you to simply loosen the collet nut, slide the mandrel to the desired length, and re-tighten, eliminating the need for spacers on short turnings and making off-center turnings a thing of the past. Precision machined for a secure fit into the lathe's headstock, the #2 MT mandrel measures 5-5/16" long, with the mandrel itself being 7-1/2" long and having a diameter of .246". This premium quality pen mandrel set includes a chuck, collet nut, mandrel, and brass locking nut, all crafted by Whiteside Machine Company in Claremont, North Carolina. Model Number: 9012