1.00 mm Cutter Diameter x 5.00 mm Length of Cut Carbide Square End Mill Finisher For Aluminum Alloys, 5 Flutes, TiB2 Coated. The variable helix design of this fully stocked Harvey Tool product offering of square profile finishing end mills for Aluminum Alloys reduces chatter and harmonics, improving finish. CNC ground from solid carbide in the USA, this tool's high helix design promotes effective chip evacuation.