Simple Ruler Calipers
cults3d
Turn a ruler into a simple external caliper. Is quite good for measuring the OD of cups. Its also good for engaging a 5 year old with something practical, however briefly. :) Key ring on the back keeps the sliding piece on. The fixed end is super glued on. Buy Rulers here: https://www.amazon.com/gp/product/B07CZFHFCR?ie=UTF8&th=1&linkCode=sl1&tag=links-after-sept2018-20&linkId=f70d6ee4e9f6b98a374d758658476d70&language=en_US&ref_=as_li_ss_tl No supports or post processing necessary. Source file included.
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