12mm 2 Flute w/1mm Radius 45? Helix HP Carbide End Mill For Aluminum, 19mm LOC, 74mm OAL, Bright Finish 19mm LOC,12mm SHANK,74mm OAL Ultra-Tool? Series 330AL Ultra-Grain? Carbide End Mill For Aluminum, Two Flute, 45 Degree Right Hand Spiral. The Ultra-Tool? Series 330AL End Mill is designed specifically for the highest possible efficiency in the milling of aluminum. The 330AL will allow full machine capacity roughing and close tolerance finishing of aluminum and other non-ferrous materials. Ultra-Tool? USA Part #11729