Be kind to your nails with the gentle grit of our premium Jada Nano Glass Nail File that promotes stronger-looking nails. This glass nail file preps nails for a manicure while smoothing out rough edges and helping to prevent breakage and splitting. The grit on our Glass Nail File is kinder on nails than most typical nail files.This reusable, environmentally friendly manicure tool was designed to last for many years and is made from durable Czech Glass with an etched grind surface for smoother, healthier-looking natural or acrylic nails. Protective casing is included for easy on-the-go manicure prep. How to use Use the Nano Glass Nail File in a gentle back and forth movement with the textured side of the file.