Dremel 9931 Structured Tooth Tungsten Carbide Cutter (Taper)

We use these bits heavily in the aerospace industry on composites, rubber, and just about anything else to rough out material to shape or to rough up a bonding surface up to achieve better adhesion. One aspect in its design that makes this bit better than most, is its ability to to cut carbon fiber composites to shape in corners or radii without bit grab, which is a massive savings in product damage that was frequent before we began using this bit.

I make wooden flags and carved each star by hand. This has by far been the best bit for doing this