Milwaukee® Jobber Length Twist Drill Bit, 12-Piece, Series: Thunderbolt® Secure-Grip™, Imperial, 15/64 in Drill - Fraction, 0.2344 in Drill - Decimal Inch, 3-7/8 in Overall Length, 2-5/8 in Cutting Depth, Parabolic Flute, 2-5/8 in Flute Length, 15/64 in Shank, Plain/Round Shank, 118 deg Point, Split Point, Right Hand Spiral Cutting Direction, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Cast Iron, Steel and Steel Forgings