The bit itself is not bad, only the idea of using a Dremel as a router is completely idiotic. It cuts no more than 3mm per pass in wood. , and you can probably get a pretty crooked line with it for 25 seconds before your router attachment falls apart in your hands. While operating a sharp cutting machine at high speed. Sorry, please get a suitable router next time. Oh, and those little parts are pretty expensive compared to real routers of similar quality (which, as a bonus, can actually get the job done). I think I'll use this thing. Next time I'll run out of bits for 3-axis machining and can get by with a slightly curved and slightly tapered cutter when cutting very soft material.