Received this set today, some things to consider before buying; They're about as well made as one would expect for the price, maybe even better. The carbide cutter is well ground and brazed onto a (tool?) steel shank. Better than I actually expected. If you intend to use them in a hand drill or similar, they will work just fine. However, if you plan to use them in a straight grinder, you may want to consider purchasing a different product. The shank is supposed to be 1/4 but is actually .235 diameter which combined with shank warping due to the high temperature of carbide brazing results in unsafe tool runout near the tip. I'm not saying this is junk because it isn't, but think about your intentions before you buy.