OSG Combination Drill/Countersink, Standard, Series: 235, 7/64 in Drill - Fraction, 0.1094 in Drill - Decimal Inch, 7/64 in Point Dia, 1.872 in Overall Length, 2 Flutes, 1/4 in Shank, 118 deg Point, Right Hand Cutting, Carbide, Uncoated, Applicable Materials: Alloy Steel, Aluminum, Cast Aluminum, Cast Iron, Hardened Steel, Inconel Nickel Alloy, Low/Medium/High Carbon Steel, Stainless Steel and Titanium