The easiest and most accurate way to cut a circle might be by using a router and a circle cutting jig. The jig acts as a compass mounted on your router. You secure the center and then position the router so that the bit is located at the radius of the circle you want to cut. You can make a simple version out of plywood, but if you want the versatility to easily cut different size circles, then we recommend one of the Rockler circle cutting jigs. We make 5 jig kit options that look pretty similar, so which one do you choose?
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