Seco Niagara Cutter 17002380 Elite S938R High Performance Medium Length Multi-Flute Non-Center Cutting Single End End Mill, 1 in Dia Cutter, 0.09 in Corner Radius, 3-1/4 in Length of Cut, 9 Flutes, 1 in Dia Shank, 6 in OAL, AlTiN Coated