1MT SHANK TO 1/2"-20 THREADED DRILL CHUCK ARBOR HARDENED MORSE TAPER MT1 ADAPTER Go to amazon.com Related posts Top 6 recommendation arbors mt1 shank FeatureOur Part # ALL-49705Works great with our threaded drill chucksMorse Taper #1 (1MT) to 1/2"-20 threadMade of high grade tool steel Description1MT SHANK TO 1/2"-20 THREADED DRILL CHUCK ARBOR HARDENED MORSE TAPER MT1 ADAPTER