Seco Niagara Cutter 17004670 Elite SR420 Center Cutting Corner Chamfer High Performance Single End Stub Length Roughing End Mill, 1/2 in Dia Cutter, 5/8 in Length of Cut, 4 Flutes, 1/2 in Dia Shank, 2-1/2 in OAL, AlTiN Coated