pMorse Roughing End Mill, Center Cutting Regular Length Single End, Series 4596, 12 in Cutter Dia, 314 in Overall Length, 114 in Maximum Depth of Cut, 4 Flutes, Fine Pitch Flute, 12 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, Cobalt 8M42 HSS, Brightp.