I bought these for a parquet project, they should be very convenient to make a tongue or groove on the end of the cut boards. I've made other hardwood floors and had to put the good boards aside just because they were cut. The bits appear to be of very good quality, the sharp teeth were well packaged with no visible damage. from bits. Update: I didn't use the bits as much as I expected, but they were essential. I had to make a plank of non-standard width right at the top of the stairs, which I couldn't do without. Bits cut great, very happy with my purchase.