Abrasives Flexible Discs are used for polishing surface, grinding a flexible ... : AC, GC and WAGrit numbers: 46, 60, 80, 100, 120, 180 and 220#Applications:AC, suitable for steel ... and iron GC, suitable for marble, aluminum, copper, cast iron ... and glassWA, suitable for stainless steel and alloy steelDiameter: 100 to ...