These are plastic, so not as sturdy as metal ones, but they do the job fine. They're light and fold up flat, so fit in a gig bag without weighing on top of your fragile acoustic guitar. I keep a few lying around for people to use.
If you stood on this, it might crack. If you're looking for a sturdier stand for gigging, the fold-up Hercules ones are excellent., for about twice the price.