Titan USA Aircraft Extension Drill, Type J, Series: 688, 1/4 in Drill - Fraction, 0.25 in Drill - Decimal Inch, 12 in Overall Length, 2-3/4 in Cutting Depth, 2 Flutes, Spiral Flute, 2-3/4 in Flute Length, 1/4 in Shank, Straight Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, M42 HSS-Co 8 Cutting Edge, M42 HSS-Co 8, Uncoated, Applicable Materials: Steel, Stainless Steel, Cast Iron, Titanium, Nickel, Copper, Aluminum, Magnesium and Synthetic Materials