Ratcheting Spinner

thingiverse

This is a one-way ratcheting spinner. Print both male and female models. On the male model, the ratcheting mechanism will need to be detached from its bottom after printing. To do this, use a small screwdriver to carefully pry it loose. There are five holes at the bottom that can be used for leverage. Once you've disengaged the mechanism, you should be able to turn it freely. The central hole can also be used to push the connections into place for a snug fit between the male and female knobs.