Tin can edge protection
thingiverse
It will allow you to use an old tin can as a pen holder without cutting your fingers on the tin can sharp edge. There is a small edge inside the gutter, thus you will have to force a little to clips the protection to the can. Ones done it is almost impossible to remove the tin can protection. 2 versions: - for 84 mm diameter tin can - for 100 mm diameter tin can Let me know if you need other diameters, I can create it for you.
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