3.00 mm Cutter Diameter x .10 mm Radius x 4.50 mm Length of Cut x 15.00 mm Reach Carbide Corner Radius End Mill For Aluminum Alloys, 3 Flutes, TiB2 Coated. This offering of Variable Helix End Mills for Aluminum Alloys - Corner Radius - Long Reach, Stub Flute is optimized for aluminum and aluminum alloys with excellent performance in copper, brass, and bronze alloys. Its long reach design makes it an excellent choice for deep cavity milling