SWAROVSKI ELEMENTS flatbacks are here! Also known as rhinestones, these components are perfect for adding sparkle to scrapbooks, flip-flops, clothing, greeting cards, cell phones and more! Please note that when using flatbacks, you should never use a glue gun or super glue as they will damage the foil backing on the rhinestones. Also be aware that while flatbacks are terrific for adding sparkle to clothing they should never be dry cleaned.