3Mâ„¢ Trizactâ„¢ Cloth Roll 307EA was designed for dimensioning and polishing hard metals prior to plating or buffing. Microreplicated structures containing aluminum oxide is resin-bonded to a flexible JE-weight rayon backing and a grinding aid helps to keep the work surface cool and protect from thermal damage. 3Mâ„¢ Trizactâ„¢ Cloth Roll 307EA is available in a range of grades, from A100 to A6.