GOOD HEALTH OF YOUR NAILS - Contributes to the good health of your nails by preventing splitting and breakage. | GENTLE ON THE NAILS - Velvet smooth surface is gentle on the nails and cuticles. | LIFETIME GUARANTEE - Effective filing surface allows precision shaping. Each file comes with a lifetime guarantee which covers the filing surface. | EXTREMLY DURABLE - the 198 Mpa stong Czech-tempered glass is hard-wearing and built to last. | HANDMADE GIFTS - Each nail file is handmade and adorned with exquisite crystals for a stylish, elegant finish.