Irwin® Hex Shank Drill, 1/4 in Drill - Fraction, 0.25 in Drill - Decimal Inch, 4-3/4 in Overall Length, 2-7/8 in Cutting Depth, 1 Flutes, Spiral Flute, 2-7/8 in Flute Length, 1/4 in Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Aluminum, Brass, Copper, Wood/Drywall, Sheet Metal, Mild Steel, High Alloy Steel, Stainless Steel, Cast Iron and Plastic