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: Each nail file is hand-made in Czech Republic. Mont Bleu Color Crystal Nail File Quality matters. So that's what you'll find in every element of these stunning crystal nail files that preserve quality where it matters most – in your nails. The glossy Czech glass is tempered for extra durability and the crystal nail file comes with a lifetime guarantee and effective coarse filing surface for extra-precision shaping. Built to last, tempered twice There is a tempering method that has revolutionized the industry, and it has evolved from the Czech techniques which transformed the production of crystal nail files. We utilize these ground breaking practices to ensure our files do not degrade in quality over the years, standing up to frequent use. Crafted from hardened Czech glass alloy, this nail file is renowned for its durability. Our double tempering process multiplies the effect, making them even stronger and allowing you to look after your nails with ease for generations. Practical yet luxurious Hygiene matters as much as durability, and for this reason each of our files comes in a protective black pouch. The file's dimensions are: 135 mm long by 2 mm thick The quality of this nail file ensures that will be a valued addition to your toiletry bag for years to come.