Keychain protractor and ruler

1.5 inch by 30mm protractor with key ring hole and tape cutter.
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updated April 27, 2022

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This has been my most useful model I've made so I wanted to share it. I always have my keys on me and here I have a quick reference for small measurements. Is this a ¼ inch bolt? Should I make the shim 3mm or 10mm? It has come in handy almost weekly for me. 

 

(Updated) I have made a new version to work with the standard 0.4mm nozzle. It a bit chunky but does print fine with a standard nozzle. While I do prefer the 0.2mm nozzle version its a bit of a pain unless you keep a printer set up with it and I myself don't really make them anymore.

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