This medium sized lime made of Omamori glass is a file made of ecological and anti-allergic products;which can be used for both nail polish and nail polish, and you can get an easy, fast and perfect result, saving you 50% of the work. In addition, the glass nail file is the solution for sensitive nails because it strengthens them and prevents them from breaking easily. It lasts almost forever and is ideal for those who want to obtain a regulated and perfect nail file;