Good wear resistance --- High grinding force, good wear resistance, for a longer-lasting grit. Professional design --- The polishing discs are made by professional manufacturing, which ensures professional efficiency, high safety and low consumption. Four different sandpaper grit sizes --- Four different sandpaper grit sizes to choose from, to meet the needs of different sanding operations. The higher the number, the finer the grit. Wet and dry dual use --- Low curvature, no creasing. They can be used on stone, lacquered surfaces, mirror surface treatments such as headlight polishing. Wooden furniture finishing, drywall sanding, automotive metal polishing, almost any polishing job can be completed with them. Used in --- furniture, hardware and auto repair. For surface polishing of iron, paint, electronic components, wooden furniture, and many types of solid wood boards. Suitable for sanding and polishing automotive products, auto repair, metal, wood, bamboo, plastic, and paint.