Excellent quality bits, very centered and very sharp. Sharp enough to open my hand almost to the bone if I was careless with one of them stuck in my (powered off and not moving) CNC router. My only complaint is that they dull fairly quickly when engraving aluminum 6061. It's not really the tool's fault as it's still HSS. The coating works well for a time, but only about 5-10 thousandths of the end of the bit is actually used for engraving, and even the carbide will not last long. For money, it's hard to go wrong.