This was the first time I used this bur to straighten the stump. The chainsaw left a lot of uneven surface on both sides of the stump that will be used for the coffee table. The material for the stump was ash. The tool bit did a great job removing material and left a very smooth surface, requiring a little sanding to finish the job. The second stump was maple. The same nozzle had trouble advancing 1/16 inch. I was able to clear one side of the stump, but couldn't finish the other side because the tool hit the tree. I bought another bit (same one) to finish the job. Good price.