I bought this to cut the neck of a ukulele flush with the neck. The beat performed well. There was a little vibration but not so bad that it couldn't be used and if that was the only issue I'd give it a 4 out of 5. The real issue for me was that there is a large gap (more than 1/16" between the bearing and the cutting blades. Since the neck is only about 1/8" thick, I had to adjust the blade high enough to allow that Bearing traced the edge of the neck This left an unfinished stripe at the edge of the work that had to be cut by hand This bit works well if you can use a thicker jig.