It is a polish holder you wear on your hand like a ring so you can keep your lacquer bottle front and center without knocking it over while switching hands.
How to Use: Squeeze together the wings to open the expandable rings. Place the nail bud on 2 fingers and release wings so it is secured on your fingers. Insert the nail polish bottle. Paint your nails beautifully and squeeze the wings together to remove from your fingers! Make sure to lift it up from your fingers so it doesn't touch the polish you just painted!