You could have the best cuticle oil in the world and the prettiest nail polish, but if you’re using the wrong nail file, you could be causing unnecessary damage every single time you shape your nails. As a nail technician, I’ve seen so many people unknowingly weaken their natural nails by using a file that’s too coarse. The right grit can make all the difference, helping you maintain strong, healthy nails without splitting or peeling. So, what exactly does nail file grit mean, and which one should you be using? What Is Nail File Grit? The “grit” of a nail file refers to how coarse or fine the surface is. The lower the number, the rougher the file. The higher the number, the finer and gentler it is. Choosing the correct grit depends on whether you’re filing natural nails, gel enhancements or acrylics. Using the wrong grit isn’t just ineffective—it can actually damage your nails. 80 Grit – Extra Coarse An 80-grit file is one of the roughest nail files available. This type of file is designed for shortening or shaping