Seco Niagara Cutter 17007063 Elite S545R Center Cutting High Performance Short Length Single End End Mill, 3/4 in Dia Cutter, 0.03 in Corner Radius, 1-5/8 in Length of Cut, 5 Flutes, 3/4 in Dia Shank, 4 in OAL, AlTiN Coated