... flexible,easy, quick,economic 3. used in grinder for polishing metal,marble Reinforced Fibre Resinbonded Depressed Center ... Grinding WheelsGrinding Tool For WeldsUsage: Polishing disc for metal, stone, stainless steel, marble, ... of automobile, boat, machine production and metallurgical, chemical construction extensively, weld, polish cast burr and flash, repair ...