Seco Niagara Cutter 17007008 Elite S545R Center Cutting High Performance Medium Length Single End End Mill, 3/8 in Dia Cutter, 0.015 in Corner Radius, 1 in Length of Cut, 5 Flutes, 3/8 in Dia Shank, 2-1/2 in OAL, AlTiN Coated