Check the listing for details. WOODRIVER Circle Cutting Router Jig. Condition: New. Listed at 211.98 USD. WOODRIVER Circle Cutting Router Jig, 186654, Cuts circles from 2-1/2" diameter to 32-1/2" diameter, Works with most any plunge router equipped to accept a Porter-Cable style guide bushing, CNC Machined aluminum base and tailstock, 1/2" sealed bearing for smooth operation, 1/2" steel guide rods for cut radius adjustment, Designed for use with a 1/4" cutter, Use this WoodRiver Circle Cutting Router Jig to cut circles from 2-1/2" diameter to 32-1/2" diameter with most any plunge router equipped to accept a Porter-Cable style guide bushing. Instead of bolting the router to the jig using a dedicated bolt pattern, simply install the included precision guide bushing into your router base and lower the router onto the sealed bearing of the circle jig base. Circles can be cut.