Having been a plant manager for 5 years and before that a contractor for 15 years, I never thought there could be such a big difference between drill bits. I've always bought the best that was available at our local stores or home warehouse, but these are beyond words better. Drilling stainless steel is literally like drilling brick with a good masonry bit. I have since bought them for each of our properties and the only replacement has been lost. I want to have shares in this company. I can't tell you how awesome it is to see "Made in USA" printed on something, and even better when it says it again on something top-of-the-line.