Replacement sanding sheet: material: durable aluminum oxide grain, with large friction, sandpaper will not fall off, loose or curl when working 10 Grits sanding discs: 5 pieces each grid, grids contain 40, 60, 80, 100, 120, 180, 240, 320, 400 and 800 grits; Quantity: 50 pieces 6 Holes sanding discs: diameter length: 12.5 cm/ 5 inch, 10 different grits to satisfy polishing need and get a good effective from rough to fine Various purpose: apply to metal and non-metal, wood, rubber, leather, plastic, stone, glass and other materials grinding, polishing and so on Good choice for sanding and polishing: durable, good abrasion resistance, anti-static and anti-clogging; The grit is larger, the polish effect is finer