Durable: The sanding block is made of high-strength diamond and high elastic sponge, with high wear resistance and reusable. Applicable to various materials: sanding 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 slabs 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 grinding block can be widely used in stone polishing, tile cutting, glass burr cutting, metal polishing and renovation, wood deburring, etc. Uses: Helps you quickly solve problems you often encounter in life such as chipping, burrs and edging.