Harvey Tool 789662-C8 | 1/16" Diameter x 1/8" Shank x 1/4" LOC x 2-1/2" OAL 2 Flute TiB2 Coated Carbide 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. Variable helix design (approx. 42 Degree) reduces chatter and harmonics, and increases material removal rates h6 shank tolerance for high precision tool holders 3 flutes Center cutting Solid carbide CNC ground in the USA Product Specifications Cutter