... disc 2) Purpose: for polishing metal, marble Specifications Polishing Disc,abrasive disc,sanding disc Features: 1) Semi-flexible sanding disc 2 ... ) Purpose: for polishing metal, marble andPolishing Disc,abrasive disc,sanding discFeatures : 1)Semi-flexible sanding disc 2)Specifications ... ") 5,000pcs per day, (6"-7") 3,000pcs per day abrasive super-flex sanding disc