8 Pack Flap Discs, 125mm Flap Discs, 40/60/80/120 Grit, Disc Compartments, Sanding Discs for Removing Burrs, Polishing, Rust, Finishing - Blue The discs are made of radially overlapping abrasive flaps. The arrangement of the flaps ensures high flexibility and high sanding performance. These grinding discs are made of high-quality zirconium corundum sandpaper, which helps you further increase work efficiency. High cutting performance and exceptional service life with good sanding results, even at low contact pressure. Suitable for stainless steel, metal (e.g. rust), wood, removing old paint, plastic, etc. Material: Stainless steel, Zirconium corundum Diameter: 125 mm Bore diameter: 22.23 mm Maximum rotation speed: 12200 rpm Grits: 40/60/80/120 The smaller the grit number, the coarser it is. The larger the grit number, the finer it is. Package: 2 * 40 Grit Flap Discs 2 * 60 Grit Flap Discs 2 * 80 Grit Flap Discs 2 * 120 Grit Flap Discs