nail polishing block usually has four sides with different sandiness. It can be four steps: nail shaping, nail polishing, polishing and polishing. Fingernail polishing block is made of high quality EVA + selected polishing material. It has no toxic ingredients to human body. It is simple to use and has four different functions. When used, the polishing block is 1.2.3.4 sides in sequence. It has obvious treatment effect on uneven nail surface. It can treat the nail surface smoothly and meticulously. The magical polishing effect will appear in a short time. Use the coarsest surface to throw lightly several times, remove the impurities of nail lines, from the coarsest surface to the second coarsest surface to the soft surface polishing, so that nails can look very bright, clean and healthy.