pMorse End Mill, Center Cutting Long Length Single End, Series 4551G, 58 in Cutter Dia, 458 in Overall Length, 212 in Maximum Depth of Cut, 4 Flutes, Spiral Flute, 58 in Shank Dia, Right Hand Cutting, 30 deg Helix Angle, RoundWeldon Flat Shank, HSS, TiN Coatedp.