This mount worked great with one minor issue. There is a small bushing on the shaft that holds the bearing in place. This yoke has a very small set screw that holds it in place so it can be removed to replace the bearing if necessary. The tiny adjusting screw disappeared at some point the first time I used it. The drill still worked without the set screw but caused vibration when the drill was pushed to speed up the cut. As long as I moved slowly, everything worked perfectly. Overall the bit was good for the price and was delivered quickly. I would order it again, just make sure the adjusting screw is tight!