You can place the rod into the top cap and then store them into the origin box.
So, looking at the pictures, it looks like you basically get 1 handle that the mandrel sits on and is then secured using cap with a hole that the end of mandrel fits through.
There is a end cap that has the post for grabbing the wire and what I assume is a hole the same size as the mandrel.
Each mandrel appears to have a shoulder on it that fits through the common handle cap.
So, if I get this correct you basically get:
1 handle with end cap
5 mandrels
5 mandrel caps/guides
And what you are saying is that for storage each mandrel screws into it's corresponding mandrel cap/guide? Because I don't see any threading on the mandrels?
Either way, I'm assuming that the box is a basic cardboard box with basic packaging slots for the parts right?
If so, that seems like a pain for storage. Maybe a plastic storage box with foam cutouts for each major component would be something you want to think about, possibly as an upgrade or something...