Seco Niagara Cutter 17004673 Elite SR420 Center Cutting Corner Chamfer High Performance Medium Length Single End Roughing End Mill, 5/8 in Dia Cutter, 1-5/8 in Length of Cut, 4 Flutes, 5/8 in Dia Shank, 3-1/2 in OAL, AlTiN Coated