No, they have soem good grinds. The problem is they aren't made very well. They are older designs, but they work fine. But the last few I tried were between 10 and 8° off in the manufacturing process (centerlines of the lobes were off that far). I think if they cant get the basics right, the rest of the work and degree of accuracy can't be much better. "Low bidder" mindset gets lowest quality every time.