pMorse Aircraft Extension Drill, Series 1391, 2564 in Drill Size Fraction, 03906 in Drill Size Decimal inch, 12 in Overall Length, 334 in Cutting Depth, Standard Flute, 334 in Flute Length, Straight Shank, 135 deg Point, Split Point, Right Hand Cutting, HSS Cutting Edge, HSS, Black Oxidep