mobile radius gauge 1mm-18mm

I created this small mobile measuring tool to do what is usually very difficult - measuring radii. There are several radius gauges that have a major weakness: they measure full semicircles, which means you can't measure corners, only rods. Therefore, the radii only go 10% of the respective radius deep into the measuring tool, so that you can hold it against any conceivable round object to determine its radius. Thus, for its compact size, it can measure radii from 1mm to 18mm. It is small and handy, so it doesn't take up much space and can be used anywhere to precisely measure radii.