Seco Niagara Cutter 17002331 Elite S738R High Performance Multi-Flute Non-Center Cutting Short Length Single End End Mill, 1/2 in Dia Cutter, 0.015 in Corner Radius, 3/4 in Length of Cut, 7 Flutes, 1/2 in Dia Shank, 3 in OAL, AlTiN Coated