Durable: The grinding block is made of high-strength diamond and high-elastic sponge, high wear-resistant and reusable. Applicable to various materials: grinding block by hand. The finer the sand, the better the polishing effect; the coarser the sand, the better the polishing effect. Suitable for: 60# is used for general E tiles and floor tiles, 100# is used for ordinary Y tiles, 200# is used for glass, and 400# is used for fine polishing. Widely used: The polishing grinding block can be widely used for stone polishing, tile cutting, glass burr cutting, metal polishing and renovation, wood deburring, etc. Usage: Helps you quickly solve the problems you often encounter in life, such as: B. Chippings, burrs and edges.