$5.00
This circle cutting router jig is fully adjustable and will cut a circle with a minimum diameter of 10″ on up depending on how long you want to make your swing arm. It is fully adjustable with in all the fractions 1/64″, 1/32″, 1/16″, 1/8″, 1/4″, and so on up to the full inch and everything in between.
All you need to build it is some scrap plywood and and a few bits of hardware.
Watch it be built here.
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