Metric Ruler for Keychains
thingiverse
For those geeky moments when you need to rough out some CAD on the bus without calipers...\nInspired by tecaccessories.com/Centipede, I wanted something with 1mm accuracy, cheaper than $22, and to design it myself. I'd really love a real Centipede, in case anyone is looking for a birthday gift for me (coming up in October!).\nSend your suggestions for improvements!\nUpdate 2016-10-08\nI uploaded a new hexagonal version which I think is the best one yet. Much stronger, easier to print, just as functional.
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