Flatback round hotfix rhinestones are made of glass material, smooth surfaces, multi-sided cutting, can decorate what you like, make your handmade works more shining, These crystals rhinestones with hot fix glue at the back do not needs to be used with glue again, you can use household iron to heated, which can be firmly attached to the surface of your clothes or other items after being heated. Or Use additional glue without heat also works, but need to clean the surface of items before use.