Harvey Tool 900461-C8 | 4.000 mm Diameter x 6.000 mm Shank x 12.000 mm LOC x 63.000 mm OAL 3 Flutes TiB2 Coated Aluminum Alloys Variable Helix Square End MillOptimized for aluminum and aluminum alloys with excellent performance in copper, brass, and bronze alloys, Harvey Tool's Variable Helix End Mills for Aluminum Alloys Square reduces chatter and harmonics, and improves material removal rates (MRR). h6 shank tolerance for high precision tool holders CNC ground in the USA Center cutting Solid carbide 3 flutes Product Specifications Tool Number 900461 C8 Cutter Diameter (Inch) 4. 000 mm Length of Cut