Drilling a piece of oak to make a tool holder for my T-handle hex and star wrenches. Ordinary small drills were too short. These bits are not straight. I rolled them out on a cast iron table saw and none of them came out straight. At least 1/8 inch from table top. Used a drill press and it wobbled so much it wasn't practical. I ended up drilling the holes with a standard bit and using this long bit to drill them to the correct depth. It worked fine. The smaller bits are quite flexible, they needed to apply minimal pressure or they could bend. But they cut well. I wish I had bought a different brand.