Seco Niagara Cutter 03115983 Elite SN638R Center Cutting High Performance Multi-Flute Short Length Single End End Mill, 3/4 in Dia Cutter, 0.03 in Corner Radius, 1-3/4 in Length of Cut, 6 Flutes, 3/4 in Dia Shank, 6 in OAL, AlTiN Coated