Swarovski Buttons 3015 are shaped in a round faceted rivoli shape and have a horizontally drilled hole through the back of the Swarovski stone making them really versatile and easy to string through. Except for jet, all Swarovski buttons comes with a foiled back to enhance the brilliance of the crystal. Swarovski buttons can be used as a regular button, a sparkly clasp, stacked together to make a bracelet, strung through a headpin to make earings, the posibilities are limitless.