Dan: I have several different Dremmels with the router bases on. They run around $20 and work fine on flat projects. I also have one mounted an a custom made router table that I use for putting molding edges on my clock parts. These bases are made by Dremmel and should fit on most Dremmels. The one you are looking at is very finely made, with precise depth adjustment. A little on the upper price side, but worth the money, but will not do the job you want on round objects without some kind of round jig to steady it. Neither will the Dremmel. When I want to carve or inlay an object, I use a modified dentest drill with dental bits of diamond or carbide. You can also buy these items at Harbor Freight. My drill runs on air pressure at 400,000 rpms. I also use this to carve Ostrich and other eggs. The plain fact is the machine is only as good as the hand thats guiding it. Like Paul Horning always said "practice, practice, practice". Use the same principle as a router, always move against the rotation of the bit or it will bite into your work. Unless you want exact depth on a flat piece, freehand is the way to go. 