You can use hotfix applicator to attach hotfix stones to various materials. Hotfix stones, or also called rhinestones, are made of lead crystal glass that is mechanically grounded and polished for a high quality finish. There is a layer of heat-sensitive adhesive on the back of the stones. This adhesive needs about 20 seconds to heat and adhere to a surface. And the suitable tool for this is a hotfix applicator that will ensure that the adhesive will melt and the stones will stick to the desired surface. A rhinestone or hotfix applicator comes with multiple mouthpieces or parts for different sizes hotfix or rhinestones.