Pin for connecting the lower jaw with the head bases

The wide base goes inside the head. The round, smooth part should sit loose inside the hole of the lower jaw (that's where the lower jaw rotates) - the diameter of this part is 1cm (to make it easy to rescale it to the size you need - measure the size of the hole at the end of the lower jaw and rescale). The wedge spreads the end to the pin to hold it in the hole of the head base. 

The pin has to be rescaled before printing - it's only meant to be printed with flexible materials (like TPU) - it's designed to work with most of my fursuit head base models.