Thingiverse
mini ballpoint pen
von AlexeyOdin
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I carry a ballpoint pen along with credit cards, and it is very convenient.
This is my second version of "pen".
This pen was developed and tested by me for almost 2 years.
I recorded a video on how to use it.
https://youtu.be/eSnm6vRJ3Ak
This is my second version of "pen".
This pen was developed and tested by me for almost 2 years.
I recorded a video on how to use it.
https://youtu.be/eSnm6vRJ3Ak
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