We recently started using these industrial drill bits for our woodworking projects and were pleasantly surprised with how efficient they were... USING this product, our team found that they easily cut through wood and helped us complete our projects in record time. The only con we experienced was that, at times the drill bits would get stuck in the wood which required us to remove and clean the bits before continuing. Overall, we highly recommend these cutting tools to anyone in need of reliable and efficient industrial and scientific drill bits..