SUPERSONIC PROFESSIONAL GLASS FILE is a glass file that works to prevent splintering and breaking nails.
It files with a particularly fine grain and prevents the tips of the nails from splitting. It seals the nail edges by filing very fine cracks and grooves.
Choosing the right nail file is extremely important to keep the nails healthy. Coarse-grained sandpaper, hard metal files and cutting the nails with scissors can separate the nail fibres so that water or harmful substances such as soap and nail varnish remover can penetrate the nail and dry it out from the inside. Glass files are more gentle. The fine nail dust that occurs while filing penetrates the tiny fibre openings and seals them.