A headphone holder that screws on to any ledge that fits. The thickest table size that it can fit on is roughly 4 cm, and I created it with a windowsill in mind. It prints in two parts: the holder and the screw, and the screw is right-handed. The threads on the screw are 0.2 mm smaller than the threads in the hole so that it has space to move, but you will need to still break in the threads by twisting the screw into the hole multiple times to wear it down. Printed with PLA on Sovol SV06 Plus printer. I also have this model on Thingiverse and you can view my profile at https://www.thingiverse.com/joeyaw/designs and Printables at https://www.printables.com/model/669071-screw-on-headphone-stand