pMorse Roughing End Mill, Center Cutting Regular Length, Series 4640, 34 in Cutter Dia, 514 in Overall Length, 3 in Maximum Depth of Cut, 4 Flutes, Spiral Flute, 34 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, Cobalt 8M42 HSS, Brightp.