Nail files used for removal of products? Some nail files are on the market so that they can help you remove products like fake nails or acrylic particles. The best example of this is the grittiest nail file on the market: 80/80 GRIT. This is not for your average nail filing and it is the hardest and grittiest nail file you can buy. This is not for your average filing days, but in fact, made specifically to help you get off nasty products or gels. Good to know.