pMorse Roughing End Mill, Center Cutting Regular Length, Series 4640G, 916 in Cutter Dia, 338 in Overall Length, 138 in Maximum Depth of Cut, 4 Flutes, Spiral Flute, 12 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, Cobalt 8M42 HSS, TiN Coatedp.