Exam pen

This pen uses a regular Bic pen refill (most of the bic refills will fit), you can probably find a few in you house.

If your refill is too long, please cut it at the end.
Slide the “cube” onto the “locking axe” and slide it into the “pen”. You may need to glue the locking axe in place with superglue, but it should hold without it.