pMorse Roughing End Mill, Center Cutting Regular Length, Series 4611, 316 in Cutter Dia, 238 in Overall Length, 12 in Maximum Depth of Cut, 4 Flutes, Coarse Pitch Flute, 38 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, Cobalt 8M42 HSS, Brightp.