2-INCH STANDING DISCS Surface Conditioning Discs, Quick Change Standing Disc- Fine Medium Coarse The set contains 25 PCS 2-inch sanding discs. The sanding discs are available in 3 grits: fine, medium, and thick to meet all your polishing needs. The sanding disc is made of alumina abrasive with high wear resistance and fast grinding force. The nylon web structure of the sanding disc can have better elasticity and plasticity for objects of various shapes. Widely used in shipbuilding, maintenance, aviation, machinery, and other metal polishing, as well as automotive, motorcycle sheet metal coating, medical equipment parts, and other metal parts processing.