20 - 500 mm Concave and Convex Radius Gauge Sets

I needed to make some measurements of large radii on a part, and there was no way to do it with a caliper. I looked around for radius gauges of the size that I needed, but couldn't find them, so I designed a set. Then I said, "why don't I make these in smaller sizes too?"

I provided a zip file in the files list if you don't need a particular size and just want the whole set.

The hole in the center is for stringing these radius gauges on a beaded chain or length of string.