Irwin® Mechanics Length Drill Bit, Fractional, Series: 305, 13/32 in Drill - Fraction, 0.4062 in Drill - Decimal Inch, 4-3/8 in Overall Length, 2 Flutes, Spiral Flute, 2-1/2 in Flute Length, Cylindrical Shank, 135 deg Point, Split/Self-Centering Point, Left Hand Cutting Direction, M42 HSS-Co 8 Cutting Edge, Cobalt 8/M42 HSS, Gold Oxide, Applicable Materials: Sheet Metal/Mild Steel/High Alloy Steel/Stainless Steel/Cast Iron