Dormer Combined Drill and Countersink, Center Drill Double End, Series: A221, 7/64 in Drill - Fraction, 0.1094 in Drill - Decimal Inch, #3 Point Diameter, 1/4 in Diameter Body, 2 in Overall Length, 7/64 in Flute Length, 1/4 in Shank, Straight Shank, 118 deg Point, 60 deg Included Angle, Right Hand Cutting Direction, HSS-E Cutting Edge, HSS-E, Bright, Applicable Materials: Alloy Steel, Aluminum, Aluminum Alloy, Brass, Bronze, Carbon Steel, Cast Iron, Cermet, Copper, Copper Alloy, Free Machining Stainless Steel, Hardened Steel, Magnesium and Nickel