The Soundhole and Rosette Routing Jig is a quality machined tool, designed to be used with the Precision Router Base and works with your Dremel.  Cut perfect soundholes and rosette channels for guitars and ukes easy and accurately.  This jig can be adjusted from 6″-diameter to a small 2″ cut.

Attach the jig to the router base, then mount your Dremel or Foredom tool.  Insert the registration pin through the center of the uncut soundhole, and into your work surface.  Place the jig on the pin. Set the diameter of cut with the adjusting screw, and lock it down. The router base adjusts the cutting depth.  Rout your rosette rings first, then cut out the soundhole.

Precision Route Base sold separately here