It’s half the anti-flap device on your awning. Like this
Take five paces back a give us another pic.
Post it on r/whatisthisthing.
Looks like it’s for a flag
So even though it doesn’t touch it when it’s closed, if it were to unravel, it would stop it. That makes sense.
So I bought the ROO 21SS last year and it has an slide awning. I really like this but I just noticed this clip like attachment by the slide. I have no idea what it used for. I originally thought when the slide is in and awning closed, it supports the awning. But it doesn’t touch it. Any thoughts?
Is there one on each side?
Source: Mystery clip on Rockwood Hybrid.


