This is either a really, really smart invention or a REALLY stupid one. I can't quite decide to be honest. It's basically a selection of clips that you use to cover your nails while they're drying to prevent smudging. And yes, you will be paying $12.50 for that pleasure. If you're a terrible fidgeter and never have your nails dry chip free it might be good for you, otherwise it seems like a waste of money to me.
Related: Diary of a nail biter - day, er, whatever it is now...