Pencil holder clamp (and clamp that holds onto it)
thingiverse
This clamp secures a pencil to a tube, preventing it from getting lost while allowing easy access for marking filament movement. Designed for personal use, the compact size prints quickly and features circles for enhanced grip. The original design includes an end for holding the clamp, but an alternative version without these elements is also available. You can find this model, along with other designs, on GitHub at o-jasper/various_physibles. A printed example is awaiting a charged camera. An update suggests printing the clamp as one piece for improved functionality.
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