the metal is good. Processed flutes are decent. Sharpening blades and cutting edges was terrible. A bit didn't cut at all, just smoked firewood without drilling. The center bars were rough, dull and off-center. I sharpen the bits myself with blind files and a slow grinder. I center the dots using a Dremel and a drill press. They're inexpensive, so frankly they're not a bad deal if you're equipped and know how to sharpen bits. Otherwise, you'll pay a lot more for quality bits while learning how to sharpen.