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 or less depending on the finish and other characteristics. I tend to think I get a lot more out of the more expensive tools so your mileage may vary. I tend to think that buying 1/8", 1/4" and 1/2" separately costs about the same amount of money and covers most things I make.