I bought this set a while ago and haven't used it much. I prefer to buy individual end mills for each type of material I need to cut, which costs a lot more. I bought this set to get started so I have sizes that I don't usually have on hand. They work well for this purpose as long as you don't work too hard with them. The edges aren't as sharp as most other end mills I have, so they're my last resort in most cases. In contrast, the best end mills I use are typically $50 each, and sometimes more