describe Various grits: The sanding blocks are available in various grits, from coarse to extra-fine. They are divided into grades of 60, 100, 200, and 400, so you can choose the grade that best suits your needs. The finer the grit, the better the polishing effect; the coarser the grit, the better the polishing effect. High-quality material: The diamond cloths are made of diamond grinding wheels and highly elastic sponges, which are very wear-resistant and reusable. They offer the advantages of fast sharpening, polishing, and high brightness. VERSATILE: Our diamond polishing pads are perfect for granite, marble, concrete, and glass. It leaves no stains on the stone surface during processing, and the polishing effect is good. PRACTICAL AND USEFUL: Suitable for home and industrial use. Lightweight and portable, easy to store and carry. Helps you quickly solve cracks, burrs, edges, and other problems that frequently occur in life. Intimate design: 60# is used for general circuit boards