you can extend them. say you have a doorway and you want to hang some curtains.
just put them on the rod, then extend and lock the rod. it'll push into the sides of the doorway and suspend the curtains, saving you from drilling holes and stuff.
Is there anything MC-san [wasn't good at as a kid?
By the end we're probably gonna find out he works as a troubleshooter for the Sket Dan or something, lol.