Clip with eraser holder for 7mm thick pencil, e.g. from IKEA. Can also be used as a cap / lead protector.
Printed from PETG standing upwards (see 3mf project file).
There might be a slight variation in the thickness of IKEA pencils, if too tight, sanding with sandpaper helps; if too loose, use a bit of tape .-) (Or, if you measure the pencil before printing, you can adjust the print size accordingly.)
I cut the eraser from a bigger piece into the hexagonal shape of the right size with a snap-off utility knife. Do not let too long piece of eraser stick out as it tends to be drawn out.
The author marked this model as their own original creation.