Seco Niagara Cutter 17007022 Elite S545R Center Cutting High Performance Short Length Single End End Mill, 7/16 in Dia Cutter, 0.06 in Corner Radius, 1 in Length of Cut, 5 Flutes, 7/16 in Dia Shank, 2-3/4 in OAL, AlTiN Coated