Seco Niagara Cutter 17002312 Elite S738 High Performance Multi-Flute Non-Center Cutting Short Length Single End End Mill, 1/4 in Dia Cutter, 0.003 in Corner Radius, 3/8 in Length of Cut, 7 Flutes, 1/4 in Dia Shank, 2 in OAL, AlTiN Coated