The back is made of high-quality nylon velvet, which sticks firmly and can be peeled off repeatedly. Dry grinding and wet grinding, individual customization, flexible adjustment of formula according to cement hardness to improve grinding efficiency and reduce use cost. Sharp and durable, easy chip removal, unique metal bond formula, outstanding performance and long service life. Mainly used for polishing concrete floors. It has the characteristics of being sharp, durable and easy to cut. Among them, 30#, 50#, 100# metal grinding discs have outstanding performance, and their service life is 3 to 5 times that of resin products. For dry grinding and wet grinding models, the formula can be designed according to different cement marks, which greatly improves the grinding efficiency and reduces the grinding efficiency.