pQualtech Aircraft Extension Drill, Heavy Duty, Series GLBCO, 19 Drill Size Wire, 0166 in Drill Size Decimal Inch, 12 in Overall Length, 218 in Cutting Depth, 2 Flutes, 218 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.