Features: Durability and longevity: Crystal glass fingernail files are made from quality glass, the fine grit permanently etched abrasive surface feels gentle on nails, durable and wear-resistant, can retain the integrity of the filing surface after multiple uses. Gentle nail care: These crystal glass fingernail files are filing in both direction, can seal the keratin layers together at the nail's edge, leaving nails smooth and healthy with no jagged edges, and provide a smooth and gentle filing experience with zero irritating scraping sensation. Protective nails: These crystal glass nail files are suitable for various types of nails, such as natural nails, toenails, rough nails, artificial nails, acrylic nails, a useful nail art manicure tool for precision filing, expertly shape nails for professional results. Specification: Material: Crystal glass Quany: Total 3 Piece color :Blue, sliver ,Pink Size: 14 x 1.2 x 0.3cm Package Include 3 x Glass Nail File with Case 3 x Protective hard cases