1. These glass nail files are made of high-quality tempered glass with double-sided etching technology to ensure your nails don’t crack or weaken. The glass is strong and durable, maintaining the integrity of the filing surface after multiple uses.2. Easy to carry, lightweight and compact, easy to put in your cosmetic bag, purse, or handbag for daily travel, not only for fingernails, but also for toenails, can be used for salon and home use.3. Reusable and easy to clean: The hygienic non-porous glass surface is not easily soiled, it can be washed with water and used repeatedly, the glass nail file will not corrode, rust, or rot.4. Safe nail care: Double-sided smooth glass file can finish any manicure without damaging the nails, perfect shape and natural, while keeping it smooth, it helps to keep the nails in good condition.