Review (5/5): Good for Holding Hair in Place......  As a ponytail holder, no.
I do find these hair clips quite sturdy! I have been using them to hold a pony tail. But not as strong to hold a ponytail on securely. The teeth are very small, and there is no grip of the hair. The clip will fall.
Many years ago, I had a ton of hair and now, sadly, it has thinned out. I now can use hair clips to hold the entire hair. I like that the clips look simple, they are not bulky and fit easily on my hair. I usually use one and/or two on the pony tail. I can wear this clip on my hair in public and it is not very visible. I am getting a lot of use right now. I like the clips! The Clips will hold a ponytail, but eventually will slide. Just use it for holding the hair back in place.