Mostly INCANNEL bits, made (I think) by the same company that makes Harbor Freight bits. Are they anywhere near the best out there? No way. Considering how HARD the Incanel notches are to find, I would definitely recommend buying them if you need them. They are quite good and inexpensive. It is unlikely that most woodworkers will ever need an incannel, and it can take a long time to use. So why spend a lot of money on something you will probably never use.