Seco Niagara Cutter 17002355 Elite S938R High Performance Long Length Multi-Flute Non-Center Cutting Single End End Mill, 5/8 in Dia Cutter, 0.09 in Corner Radius, 2-1/2 in Length of Cut, 9 Flutes, 5/8 in Dia Shank, 5 in OAL, AlTiN Coated