https://www.fujistarabrasives.com/products/grinding-sponge/ FujiStar Pyramid Grinding Sponge feature microreplication technology for precise, uniform abrasive surfaces, making it ideal for refined finishing work in the body shop. When it's used in place of conventional body repair abrasives across a total paint finishing job, you'll immediately notice finer, glossier results. FujiStar Pyramid Grinding Abrasives can speed up and even take out time-consuming steps in paint finishing, from defect removal to scratch refinement to scratch elimination.