Sorry for the blurry picture but I think you can see enough. There is a groove running down the center of this molding. I cut it with a scraper. The scroll is about 3/16" dia( about 5 mm i think) I want to continue the groove around the scroll. I tried all the Dremel bits I have and they all seem to be to big or too poor quality to cut a small groove. They are just a cheap assortment of bits. I'm thinking that rotary dental bits may work. At least the blame would be on me . I did a search and found some on Ali but they look very similar to the crap that I have. Does someone have a link to where I can get real, quality dental bits that may work for me.