I bought a cheap digital caliper from amazon about half a year ago, however the electronics apparently didn't like being used as an improvised hammer, and the electronic part of the caliper quit working.
So i designed a conversion kit that easily bolts right on, and allows me to measure things until a replacement arrives.
The measuring tolerance of this tool is realistically around ~0.2mm, but its still more precise and more convenient then a normal ruler.
The part uses the original self tapping screws from the caliper.
The shown part was printed on an Ender-3 with a 0.2mm Nozzle. A 0.4mm Nozzle should also work, however the numbers might not be easily readable.