This tool is the little brother of my first radius tool kit. It measures 1-10mm sizes, concave and convex, and fits into a convenient fold-up carrier for designing on the go. This radius sizes all print fine, though it was helpful with the smallest 1mm size to put a help disc at the very tip of the tool when printing to preserve the point.

Additionally, the case must print with supports. Print with the text side facing down, and add supports on the bed to hold up the top cross support.

Interior angles on the case will dictate the order of installation for the tool sizes.

Please note This tool measures the radius size, but many cad programs use diameter sizes when drawing circles.