Ball pen holder for notepad box memobox or cubes - best gadget ever!
Summary it's just another nice gadget for a thing that nearly everyone have. Kullihalter4.stl has an inner diameter of ~11,4mm and kullihalter5.stl an more common diameter of 10mm. If you're unsure print Kullihalter5.stl Instructions You can mount it on with the ball pen showing into the box or outside. If you work on place where it is very windy i prefer to install it on the inside, so it can work as a downholding weight, and the papers don't fly away