Harvey Tool AVA3750-C8 | 46 mm Flute Length x 10 mm Shank x 100 mm OAL 3 Flute TiB2 Coated Carbide Micro Drill BitOptimized for drilling aluminum and aluminum alloys with excellent performance in unfilled plastics, copper, brass, and bronze alloys, this comprehensive offering of high performance drills features a special 3 flute design to maximize chip flow, hole accuracy, and finish. Special 3 flute design to maximize chip flow, hole accuracy, and finish 130 Degree point angle Polished flute valleys and TiB2 coating prevent built up edge and extend tool life h6