Review on Rowiz 5Pcs Shank Countersink Drill by Tim Harrington

These bits are not very good. The center drill adjusts and the set screw holds well, but the countersink is poorly designed and won't cut. I used #8 to countersink some holes in the cherry and it took a lot of effort to cut the countersink. They are terrible to use. Also, #8 had some wobble, as if the pilot drill was off-axis with the countersink. After minimal use the pilot jet broke on the 20th hole and I threw the whole set in the trash and went to the store and bought a good quality jet.