Swarovski Hot Fix Round Flat Back Rhinestones have a heat sensitive adhesive on the flat side of the stone. There are several ways to adhere your rhinestones to your project. You can use the hot fix rhinestone tool - which enables you to place one rhinestone at a time onto your project. Simple method, clean and quick! You can also use an iron or be really creative and make rhinestone transfer motifs. Learn more about applying hot fix rhinestones under our TIPS and PROJECTS section of our website. Don't forget to color match your rhinestones to your project by using out handy Rhinestone Color Chart. We offer Swarovski Hot Fix Round Flat Back Rhinestones in a number of quantity options choices, ranging from 1 stone to Manufacturer Wholesale Packs. The Manufacturer Packs come in quantities of 1 gross, 2 gross, 2.5 gross or 10 gross, depending on the size of the rhinestone and can be found under our Swarovski Wholesale Factory Packs section. When purchasing rhinestones that are in a quantity less than the Manufacturer Wholesale Pack, our staff breaks down the wholesale packs, hand counts the rhinestones (not weighed) and then packages them in small zip lock bags with appropriate labeling..