Mucota Sport Nail - 1 pc. Nail care of choice for professionals who provide nail care services. Surface of the file is dotted with semiconductor technology to polish the nail surface evenly. The nail surface can be made shiny without using nail polish, gel nail polish, or other brightening agents. Nail care that usually requires three to four steps can be completed in only one step. It can also add luster without thinning nails. ■ How to Use 1. Clean your fingertips. The nail surface should be free of nail polish, etc. 2. Move the rough surface from side to side to smooth out the shape and surface of the nail. 3. Brush off the nail shavings and you're done. 4. To keep the product hygienic, wash it with water, etc.