Titan USA Silver and Deming Drill, Series: DSF-ST, 41/64 in Drill Size - Fraction, 0.6406 in Drill Size - Decimal Inch, 6 in Overall Length, 3-1/8 in Cutting Depth, 2 Flutes, Spiral Flute, 3 in Flute Length, 1/2 in Shank, Reduced/Round Shank, 135 deg Point, Split Point, Right Hand Cutting, M42 HSS-Co 8 Cutting Edge, M42 HSS-Co 8, Uncoated, Applicable Materials: Steel, Stainless Steel, Cast Iron, Titanium, Nickel, Copper, Aluminum, Magnesium and Synthetic Materials