pMorse End Mill, Center Cutting Double End Regular Length, Series 4582, 58 in Cutter Dia, 5 in Overall Length, 138 in Maximum Depth of Cut, 4 Flutes, Spiral Flute, 58 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, Cobalt 8M42 HSS, Brightp.