The bits are really sharp and work great. The sizing is not very good. There is no mark at all on one bit, and the rest is poorly readable. The packaging is terrible. The pieces were shuffled and had to be put back in their place. The unmarked one was the last one waiting, so I knew where to put it. One of the pieces shifted during shipping and punched a very small hole in the top of the box, but nothing major, just a disappointment. I would buy them again (hope I never have to) because they were so much better than my non-carbide bits, I would only lower my expectations.