Seco Niagara Cutter 03115973 Elite SN638R Center Cutting High Performance Multi-Flute Short Length Single End End Mill, 5/8 in Dia Cutter, 0.06 in Corner Radius, 1-3/8 in Length of Cut, 6 Flutes, 5/8 in Dia Shank, 5 in OAL, AlTiN Coated