General description 150 Pieces Multi-Grit Grinding Wheel Set - Our grinding wheels offer you many different grit options. You will receive the 150 sanding discs in 10 different grades, including 60 grit, 80 grit, 100 grit, 120 grit, 150 grit, 180 grit, 240 grit, 320 grit, 400 grit, and 600 grit. The higher the number, the finer the grit. Technical specifications Diameter of grinding wheel: 125mm Diameter of each hole: 10mm Grit options: 60, 80, 100, 120, 150, 180, 240, 320, 400, 600 Quantity per grit: 60/80/100/120 x 20 pieces; 150/180 x 15 pieces; 240/320/400/600 x 10 pieces Material: High quality aluminum oxide abrasive Compatibility and accessories Suitable for universal orbital sanders such as Bosch, Makita, BLACK + DECKER, etc. Usage Excellent for staining and finishing metal and non-metals, wood, rubber, leather, plastic, stone, glass, and other materials. Other information 8 holes designed for efficient dust extraction Lint-free backing for easy replacement of grinding wheels