Safety eyes with retention ring

This safety eyes need to be printed with low layer height (0.1mm) to achieve a nice result.

The eyes are made from two different parts for ease of printing (the rod and the head) that need to be glued together, and also it make it easy to make custom head that can fit the existing rod (the dimension on the hole in the head is  Ø2.8mm and 1.6mm depth).

When you have inserted the retention ring you'll need to break it in order to take it off, so be careful ;)