For packing joints.
I made a little baseball bat years ago for that purpose and recently had fun making more different ones for friends.
As you can see I used a piece of rebar for the bat.
I "turned" it using a drill and angle grinder then going through different grains of sanding:
The lightsaber's hilt was made the same way, using a dremel tool to get more control on the details.
The "blade" is made of Corian, a synthetic stone commonly used for countertops.
The sword required a lot more precision to make and ended up okay but looking closely nothing is really symmetrical or straight...
I grinded it from a random stick of metal, the pommel is made from aluminum and the grip is two layers of sewing thread soaked in superglue, sanded, then superglued again.
A cross-guard would have added a lot of character but I didn't find a nice and easy enough way to do it, and I was short on time...
Well, since I've already linked to two of my not-quite-a-lathe projects, I might as well link to the one which started it all: https://sh.itjust.works/post/16087080
This one does have a motor, but not a conventional one at all. And this only worked because the thing I'm turning would need a center hole drilled through anyway.
Woaw now that's a nice jig I'm going to keep in mind for later use!
I love the multitude of solutions people can think of to get to their goals.
Props on making your own stuff!