I bought this hobbyist CNC kit which I have been using since this year. These beats are definitely worth the price of admission. Consistent, clean cuts, and they run pretty cool as I've never had a case where they were too hot to handle during bit changes. Amana Tools is the only brand of bits I use with CNC. In addition, they provide recommended feeds and speeds that give most a good starting point for fine-tuning their cuts and notches.