LFA / Reichel Hardware 2MT1/2 2 Morse Taper by 1/2-20 Threaded Arbor, Chrome Shank size: 2 Morse Taper Chuck Thread: 1/2-20 Note: Photo shows a Morse Taper to Threaded Mount arbor, but not necessarily this specific arbor Please do not use the photo to judge the relative size of the taper