It’s surprising how often I seem to have the need to make a circle for a woodworking project and my regular drafting compass is too small. Usually, I will search around the shop and kitchen to find a bowl or a bucket that is close enough to the size I need. If I need a really big circle, I tie a string to a pencil and create an arc. This poses accuracy problems, and sometimes the string stretches.
A few weeks ago Jay Kopanski sent me a cool compass he made out of oak. I knew right away I had to make one!