Nail files come in a variety of grits, ranging from coarse 80-grit to ultra-fine 240-grit, each serving a different purpose in nail care. An 80-grit nail file is very rough and best suited for shaping and shortening thick acrylic or artificial nails, as it can remove material quickly. Moving to 100 and 180 grit, these medium files are ideal for refining the shape of acrylics and smoothing natural nails without causing excessive damage. Finally, 240-grit files are the finest, perfect for finishing touches, smoothing edges, and prepping the nail surface for polish or gel application. Choosing the right grit ensures healthy, well-maintained nails while preventing unnecessary breakage or damage.