One way Pulley

There where no one way pulleys, I found that unacceptable.
A one way pulley that's all print, no screws, no nuts and bolts, no glue, no bearings.
It's nice when you have metal bits, but it's also nice to have Things^TM that are pure print.

Oh right, don't do stupid shit with this.

If you find this useful or entertaining enough, tips are welcome. :)