Drillco Aircraft Extension Drill, Type J Imperial, Series: 1200C, 3/8 in Drill Size - Fraction, 0.375 in Drill Size - Decimal Inch, 12 in Overall Length, 3-5/8 in Cutting Depth, 3-5/8 in Flute Length, Straight Shank, 135? Point, Split Point, Cobalt, Bronze, Applicable Materials: Alloy Steels, Stainless Steels and Titanium. Drillco 1200C124 Type J Imperial Aircraft Extension Drill, 3/8 in Drill - Fraction, 0.375 in Drill - Decimal Inch, 135? Point, Cobalt