4" Gamma Polishing Pads are made specifically for Engineered Stone. Gamma Polishing Pads are used to leave a high quality polishes on quartz, silestone, ceasar, engineered stones and other man-made stones. Engineered Stone Polishing Pads by Gamma Brand are top quality, designed to give you long life and a perfect finish. Engineered stone pads are made with light resins to prevent bleeding on the typically lighter Engineered stones pours. Higher diamond concentration and high quality resins allow for long lasting pads that leave a high quality finish on engineered stone.