Seco Niagara Cutter 17004721 Elite AR330 Center Cutting High Performance Medium Length Single End End Mill, 5/8 in Dia Cutter, 0.025 in Corner Radius, 1-5/8 in Length of Cut, 3 Flutes, 5/8 in Dia Shank, 3-1/2 in OAL, TiCN Coated