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