pMorse End Mill, Center Cutting Regular Length Single End, Series 4550, 12 in Cutter Dia, 21116 in Overall Length, 1 in Maximum Depth of Cut, 4 Flutes, Spiral Flute, 38 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, HSS, Brightp.