Contributes to the good health of your nails by preventing splitting and breakage.The velvet smooth surface is gentle on the nails and cuticles.Effective filing surface allows precision shaping.Extremely durable - the Czech-tempered glass is hard-wearing and built to last. Each file comes with a lifetime guarantee which covers the filing surface.Each nail file is hand-made in Czech Republic.Mont Bleu's Set of 3 Rainbow Crystal Nail FilesQuality matters, and that’s what you’ll find in every element of this set of 2 crystal nail files.There’s quality in our methods of production, with twice-tempered glass that’s traditionally forged in Czech Republic. All these components come together to create a nail file that preserves quality where it matters most – in your nails.Tempered twice and built to lastWhen Czech methods transformed the production of crystal nail files, this was down to an innovative tempering method that revolutionized the industry. We use those same ground breaking techniques to create nail files that stand up to intensive use – with no degradation in quality.This nail file is crafted from a hardened Czech glass alloy – renowned for its durability. But we don’t stop there. We temper our files again during the production process to make them even stronger, so you can shape your nails smoothly for years to come - guaranteed Practical set of 3Durability isn’t enough to make a nail file last. The more you use it, the more hygiene matters. That’s why this nail file comes complete with a pouch to protect against dust and dirt. And with strong, finished glass, your file won’t absorb moisture or bacteria.The set contains 3 files, all designed with your lifestyle in mind: 90 mm for your purse, medium 135 mm for work, large 195 mm for home.With its durability, hygiene, and focus on quality, it’s quite simply the only crystal nail file set you’ll ever need.