A radius gauge for finding the corner radius of items. Can measure radii from 0 to ~100mm. Also included is a quick-reference label that can be printed on a DymoLabel printer, and stuck on. Rename the label file to “.label”, as PrusaPrinters won't allow the native file. 

Note that this file has a cutout so it fits nicely with the AlphaTools Calipers, but any other calipers should also work. (Calipers: https://www.bauhaus.info/winkelmesser-schieblehren/alpha-tools-digitaler-messschieber/p/20497503 )

To convert to a corner radius, multiply the caliper measurement by 2.4142.

Radius accurate to ~0.25mm, per the photos.