Just finished milling over 40ft of tenon boards and the last board looks as good as the first. I've tried two other brands that burned wood and dulled the drill bit. This is now my favorite brand. I didn't have to babysit a bit. That beat was awesome. Over the years, working with wood has always required me to work slowly and pay attention to the details, but not those details. I saved a lot of time and nerves. Thanks very much!