Seco Niagara Cutter 03115953 Elite SCS638R High Performance Medium Length Multi-Flute Single End End Mill, 3/8 in Dia Cutter, 0.015 in Corner Radius, 1-1/4 in Length of Cut, 6 Flutes, 3/8 in Dia Shank, 3 in OAL, AlTiN Coated