I saw these lash and brow combs on Amazon when I was looking for a metal lash and brow comb. I decided to take a chance and order them and they turned out to be a good purchase. The folding functionality wasn’t really important to me, but it does work well. The piece that was important was that it was a metal comb and not plastic that will break. These combs work well to comb and smooth out my eyebrows, and they also do double duty to remove any clumps in my eyelashes from mascara. They’re also easy to clean as well. I can’t think of any other uses for them, but they do a great job for what I need them for.