Create the hole and thread in a single operation. No centerdrilling or punching required. Its tapered neck design significantly reduces drill & tap breakage. A 135° split point permits hole and thread to be cut at highspeeds. Available in standard, metric, and machine screw tap sizes. Superior strength and durability provided by high molybdenum, high speed steel. Functional black and gold surface treatment holds lubricant forsmoother drilling. 1/4" and 11/32" Hex shank can be used in QCD (Quick ChangeDriver).