Triumph® Screw Machine Drill, Heavy Duty, Series: T4, Imperial, 9/64 in Drill - Fraction, 0.1406 in Drill - Decimal Inch, 1-15/16 in Overall Length, 15/16 in Cutting Depth, 15/16 in Flute Length, 135 deg Point, Split Point, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Iron, Cast, Steel, Low Medium Carbon and High-Tensile Strength Alloys