Review on Enhancing Precision and Efficiency with Woodworking Electrical Rotating Embossed Grinding by Victor Rodriguez

I bought these hoping they would fit my drill press. They didn't. They should be, but they are free. I could get her to do the work I needed, but it was DIFFICULT. As another user noted, they aren't very good for wood chips and the drill works much better for holes. But otherwise I really had problems because the bits in the drill wanted to turn as soon as they met resistance. At the end of the (very quick) job I have the ringed bits where my drill went into the bit. I'm not happy with it at all.