USN Files Regular White 80/100 Grit 50/Pack SPECIFICATION Color: white Grit: 80/100 Package contains: 50 Files Size: Thick = 0.16" (4mm) x Wide = 0.75" (19mm) x Length= 7" (178mm) DESCRIPTION Firm padding allows for control and faster refinement. Used for taking down length on enhancements. Firm padding allows for control and faster refinement. Premium Quality Double Sided Nail Files, all you need to trim and shape your nails perfectly. Works with all artificial, acrylic nails, Nail gel tops, and false tips. Can remove nail gel from extended or fake nails Perfectly suitable for Nail Salon ABRASIVE SURFACE The grit is a nail file’s surface. It tells you how fine or coarse the file is and how rough it will feel on your nails. The lower the grit, the coarser the file is, and the higher the grit the smoother the nail file’s surface is., Here is a quick summary of the grit levels: 80 grit: This is very coarse (rough) file and should never be used on natural nails. Some might use this on artificial or acrylic nail extensions but extra care must be considered when using it. It may also be still a little rough even for artificial nails. 100 grit: This grit is still a coarse file but can safely be used only on artificial nails. 180 grit: This is the lowest grit level and should be used on natural nails. However, if you have broken or damaged nails (or even nails that are prone to breakage), you need to use a file with a finer grit. 240 grit: A file with this grit level is often used to buff the nails to a smooth finish or to buff away stains/discolorations, small bumps, and to shape the free edges of the natural nails.