Majestique Crystal files do not damage, tear, or shred the keratin layers. Instead, they seal the keratin layers together at the nail's edge as you file, ultimately leaving nails healthy, smooth, and with no jagged edges. This also prevents potential nail splitting, chipping & peeling, allowing you to grow healthy, beautiful nails. Nails are made from keratin, a protein that’s also found in your hair. Typical metal files can be harmful to natural nails, tearing, shredding & damaging the delicate keratin layers, resulting in poor nail health. A high-quality, Crystal nail file crafted from premium Crystal, tempered (toughened) to ensure the Crystal is strong, wear-resistant & retains the integrity of the filing surface after multiple uses. Nail file comes in a protective case that is ideal for storing your file in your purse or bag. Keep your file close by & always be prepared for emergency nail snags & accidental chips & breaks.