Here is Headphone clamp Desk Mount hook, this awesome design lets you clamp mount a hook to your desk to hold your headphones, the size of the clamp fits most headphones and is a very small and quick print for larger headphone or for more strength scale up to 130%, To assemble the headphone clamp push the clip on to the bottom of the threaded screw making sure to push down firm until the clip clips onto the threaded screw, if your the screw keeps breaking make sure to increase the temperature on your printer and try reprinting just the screw and clip. Print settings, Nozzle size 0.4mm, Layer height 0.2mm, Print speed 100ms, No supports needed, No brim, Infill 20%, Wall count 3.