Again an amazing 3D model idea by Duc Tran from @FORMBYTE.
This creation will let you extend your pencils and use them longer. So, don’t throw away your short pencils, extend them!
Layer height: 0.1 - 0.2 mm
Infill: 50 %
Speed: 50 mm/s
Download the STL on Cults here: https://cults3d.com/en/gadget/rocket-pencil-extender