I originally used this to mount a second mic to the lower portion of my stand. I found this so useful I bought a second one.
Now I use them to extend the height of my stereo bar, or space mics differently in an array.
I use them as a straight bar, or bend them to whatever angle I require. Sometimes I use both, screwed together, as a single piece. The quality is excellent, and they maintain their stiffness really well. I have had no issues with sagging, even when supporting four mics + shockmounts on a large stereo bar.
All-in-all these are a very versatile part of my recording kit.