From the Manufacturer

Champion DT22Hex combination drill and tap create holes and taps in a single operation with no center drilling or punching necessary. They can be used in corded, cordless and impact drills.

• Tapered neck design significantly reduces drill & tap breakage
• The 135 degree split point drill permits holes to be cut at high speeds. Taping caution must be adhered to with slower speed.
• Superior strength durability provided by high Molybdenum content and high speed steel with functional black and gold surface treatment that holds lubricant for smoother drilling.
• Applications include: Construction, Electrical, Maintenance, Industrial, Automotive, Farm Implement Machinery, HVAC. Cuts steel, cast iron, aluminum, bronze, brass, zinc and some stainless steel.
• Contents include: 6-32, 8-32, 10-24, 10-32, 12-24 B001TREZ7W