#2 Morse Taper. Includes (5) 7mm bushings, knurled nut, and 7mm drill bit. This mandrel easily adapts to different length projects. Features a 7mm mandrel shaft that slides through a headstock collet. Simply mount your tubes and bushings, then slide the shaft to the appropriate length and lock it in place. The shorter shaft reduces the likelihood of the mandrel shaft bowing. 7/8" wrenches (PKMWR) are not included. Can be used with PKMSTS2 Live Mandrel Saver #2MT.