Seco Niagara Cutter 17002197 Elite AN340 Center Cutting High Performance Single End Stub Length End Mill, 1/4 in Dia Cutter, 0.01 in Corner Radius, 5/16 in Length of Cut, 3 Flutes, 1/4 in Dia Shank, 2-1/2 in OAL, TiCN Coated