From the MAKE Flickr pool
Another great idea for a business card, Adrian’s laser-cut card transforms into a handy little caliper. Plans are available on Thingiverse.
4 thoughts on “Business card caliper”
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Good idea, but the abbreviation for milimeter within the International System of Units is mm, not MM.
Scientific American has a paper slide rule .pdf
http://www.sciam.com/media/pdf/Slide_rule.pdf