Seco Niagara Cutter 03007649 Elite S638R Center Cutting High Performance Multi-Flute Single End Stub Length End Mill, 1/2 in Dia Cutter, 0.09 in Corner Radius, 1-1/4 in Length of Cut, 6 Flutes, 1/2 in Dia Shank, 3 in OAL, AlTiN Coated