This is the hardware kit for overdoor neck trackor, you can make neck traction at home.
Did too much sewing work and neck hurt? Now make a tractor to keep healthy, it is also the best gift to your family :)
See how it works: https://www.youtube.com/watch?v=cbXDnutSYzg
You can get the neck tractor pattern here: https://www.leathercraftpattern.com/overdoor-neck-tractor-pattern-pdf-download-SLG-148