Triumph® Jobber Length Drill Bit, General Purpose, Series: T1B, Imperial, 7/16 in Drill - Fraction, 0.4375 in Drill - Decimal Inch, 5-1/2 in Overall Length, 4-1/16 in Cutting Depth, 2 Flutes, Spiral Flute, 4-1/16 in Flute Length, 7/16 in Shank, Straight Shank, 118 deg Point, Standard Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, Black Oxide, Applicable Materials: Cast Iron, Low and Medium Carbon Steel, Stainless and PH Steel