Sandvik Coromant Screw Machine Drill, High Performance, Series: CoroDrill 860, Imperial, 1/4 in Drill - Fraction, 0.25 in Drill - Decimal Inch, 3.11 in Overall Length, 3XD Cutting Depth, 2 Flutes, SSK Flute, 1.339 in Flute Length, 0.315 in Shank, Cylindrical Shank, 147 deg Point, Split Point, Right Hand Cutting Direction, Solid Carbide Cutting Edge, Solid Carbide, TiAlN , Applicable Materials: Steel, Stainless Steel and Aluminum