Designed to our high standards, these ergonomically-shaped Files and Buffers reduce length and precisely refine shape, of course. But theyre also designed to make your days feel shorter and your career last longer. The Diamond file is a one-sided, ultra thin diamond-coated file so you can reach those lower arch and sidewall areas with ease. Also works on gels. It is fully sanitizable and will last a few years. Now thats a nail techs best friend.