Seco Niagara Cutter 17007011 Elite S545R Center Cutting High Performance Medium Length Single End End Mill, 1/2 in Dia Cutter, 0.015 in Corner Radius, 1-1/4 in Length of Cut, 5 Flutes, 1/2 in Dia Shank, 3 in OAL, AlTiN Coated