pQualtech Aircraft Extension Drill, Heavy Duty, Series GLBCO, 1764 in Drill Size Fraction, 02656 in Drill Size Decimal Inch, 12 in Overall Length, 278 in Cutting Depth, 2 Flutes, 278 in Flute Length, Round Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, Cobalt Cutting Edge, Cobalt, Gold, Applicable Materials Inconel, Stainless Steel and Titaniump.