Bought these at the grocery store that I work in yesterday.
Some background to my hair: My hair is very fine and flyaway, a little longer then bra strap length, and a little above medium volume. I am very picky about what goes in my hair, as I don't want to damage it while it is up in a bun. I usually live in a metal Ron Quattro Starlights fork to hold up my dry hair. When I use hairpins, I usually use two or three 3" length Amish style steel pins in damp/wet hair, which holds like a rock until I take them out. They don't work on dry hair for me, so I couldn't use the two that I had in my purse.
I had forgotten my usual hair fork, and needed something other then a hair elastic to keep my hair out of my face, and off of my neck. These are very expensive, $6.99 for two. (I know I bought them in a grocery store, which is not very economic of me, but still, my only other options were plastic claw type clips, which my hair laughs at and then spits out.)
They held for the most part. I prefer a neat bun, which was not possible for the two pins to sustain. My hair in a bun is quite thick, and I tried to catch some scalp hair to keep it from slipping out, but some of the ends came out anyway,and got in my face, which is annoying when you are trying to run a cash register. I had to redo it after an hour, and again, after a couple of hours, when I did my hair in a figure-eight type bun, with the top coil flipped to make my bun look like an 8, with each loop getting a pin screwed in horizontal to try to catch scalp hair and hold it better. That held for the remaining four hours of my shift.
I will have to continue to play around with these to see if I can make them work, but I'm not betting that they will be something I reach for on an everyday basis.