Seco Niagara Cutter 17007027 Elite S545R Center Cutting High Performance Single End Stub Length End Mill, 1/2 in Dia Cutter, 0.02 in Corner Radius, 5/8 in Length of Cut, 5 Flutes, 1/2 in Dia Shank, 2-1/2 in OAL, AlTiN Coated