The BlueSpot 11 PCE Polishing and Flap Disc Set features a range of aluminium and zirconium abrasives (40, 60, 80 &120 grit) and polishing discs. Ideal for fabrication, de-burring, cleaning, stripping and finishing of wood, metal and plastic. The discs feature a 22.2mm centre and 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. Package Contents - 115mm Stripping Disc (Max 11,000 RPM), 115mm Felt Polishing Disc (Max 11,000 RPM), 115mm Sponge Polishing Disc (Max 11,000 RPM), 4 PCE 115mm Aluminium Flap Disc 40 Grit, 60 Grit, 80 Grit, 120 Grit (Max 13,300RPM), 4 PCE 115mm Zirconium Flap Disc 40 Grit, 60 Grit, 80 Grit, 120 Grit (Max 13,300RPM).Stripping and polishing discsAluminium and zirconium flap discsIdeal for fabrication, de-burring, cleaning, stripping and finishing of wood, metal and plastic