This 11 piece Polishing & Flap Disc Set features a range of aluminum & zirconium abrasives (40, 60, 80 &120 grit) & polishing discs. Ideal for fabrication, de-burring, cleaning, stripping & finishing of wood, metal & plastic. The discs feature a 22.2mm centre & are for use with 4 1/2" angle grinders. The plastic packaging that the product is packed in can be reused as storage for the set.