Review on Industrial Tool 3016011 Cobalt Degree by Carl Durant

I don't know if these are genuine Irwin bits or not, but they drill pretty well. I've gotten 12 to 14 holes through mild steel with no oil, which isn't bad. Then I sharpened them with the Drill Doctor and made 4-5 more holes in each one. I plan to keep sharpening them as they continue to drill.