The Blitz Watch Care Kit is specially formulated for the care of gold, silver, platinum and leather watches. Not for use on porous gems and pearls. Each kit includes: 4" x 6" Polishing Cloth: Cleans and restores the original brilliance to your watch face. 4" x 6" Silicone Leather Treatment Cloth: Clean and Protect your leather watch bands. Blitz Foamz: Deep cleans your metal, diamond and gem stone jewelry without the mess. 8" x 8" Microfiber Cloth: Cleans and takes special care of crystal faces. These cloths are designed to be lint free and are designed to not scratch or damage your watch face in any way.