STEP 1: used for repairing file nail edge. STEP 2: follow the same direction file plane nail surface. STEP 3: often used to grind slide nail surface. STEP 4: may at any time to friction nail surface, make produce gloss. Method of use: For uneven nail surface has significant treatment effect, and can fingernail surface treatment to smooth. The magic polishing effect can appear in a short time To use the coarse surface light throw several times, remove a surface texture, from the rough surface to time coarse surface until and tender surface polishing, so can make nails look bright very clean health. Can also be used to crystal nail polish.