pMorse End Mill, Center Cutting Double End Regular Length, Series 4553, 78 in Cutter Dia, 618 in Overall Length, 178 in Maximum Depth of Cut, 4 Flutes, Spiral Flute, 78 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, HSS, Brightp.