
Nail files are labelled with numbers that refer to the coarseness of the grit on the nail file surface. The higher the number, the smoother the file grit, and the lower the number, the coarser the file grit. For example, a 180/180 grit file means both sides are the same and that there are 180 grits on 1 square cm.
| Characteristics | Values |
|---|---|
| What does grit mean? | Refers to how coarse and abrasive a nail file is |
| What do the numbers mean? | The number of abrasive granules per square inch |
| What do different numbers on each side mean? | Different grit on each side |
| What does a higher number mean? | Smoother file grit |
| What does a lower number mean? | Coarser file grit |
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What You'll Learn

The numbers on nail files refer to the coarseness of the grit
The numbers refer to the size of each grain, as the number tells how many grains of sand fit into one square inch. The smaller the grains of sand, the more fit into a square inch and the higher grit or smoothness. Much like sandpaper used for woodworking, nail files are also graded by grit size. A lower grit number means larger, fewer grains, resulting in a coarser file, while a high grit number means smaller, more numerous grains, resulting in a finer or softer nail file.
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The higher the number, the smoother the file
Nail files are graded by grit size, which refers to the number of abrasive granules per square inch. The numbers on a nail file indicate how coarse the grit is on the nail file's surface. The higher the number, the smoother the file grit. A lower grit number means larger, fewer grains, resulting in a coarser file. A higher grit number means smaller, more numerous grains, resulting in a finer or softer nail file.
The numbers on a nail file refer to the size of each grain. The smaller the grains of sand, the more fit into a square inch, and the higher the grit or smoothness. For example, a 180/180 grit file means both sides are the same and that there is 180 grit on 1 square cm. If both numbers are the same, then both sides have the same grit. If the two numbers are different, then the two sides have different grit.
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The lower the number, the coarser the file
The numbers on nail files refer to the coarseness of the grit on the file's surface. The lower the number, the coarser the file. For example, a 100/100 grit file means both sides are the same, whereas a 100/180 grit file will have one side with a softer grit than the other. The numbers refer to the size of each grain of sand, with the number telling you how many grains of sand fit into one square inch. The smaller the grains of sand, the more fit into a square inch and the higher the grit or smoothness.
Nail files are graded by grit size, much like sandpaper used for woodworking. The grit number refers to the number of abrasive granules per square inch. Therefore, a lower grit number means larger, fewer grains, resulting in a coarser file, while a higher grit number means smaller, more numerous grains, resulting in a finer or softer nail file.
Nail file grit grades are an important fundamental piece of information to know about nail files. The numbers refer to how coarse and abrasive a nail file is. You’ll typically see files labelled by number, usually between 60 and 1000.
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The numbers refer to the size of each grain
The numbers on nail files refer to the size of each grain on the file's surface. The higher the number, the smaller the grain and the smoother the file. A lower grit number means larger, fewer grains, resulting in a coarser file. For example, a 100/100 grit file means both sides are the same, whereas a 100/180 grit file will have one side with a softer grit than the other. If both numbers are the same, then both sides have the same grit; if the two numbers are different, then the two sides have different grit.
Grit numbers on nail files are typically between 60 and 1000.
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The numbers refer to how many grains of sand fit into one square inch
The numbers on nail files refer to the coarseness of the grit on the file surface. The higher the number, the smoother the file grit. The lower the number, the coarser the file grit. The numbers refer to how many grains of sand fit into one square inch. For example, a 100/100 grit file means both sides are the same. A 100/180 grit file, on the other hand, will have one side with a softer grit than the other. If both numbers are the same, then both sides have the same grit. If the two numbers are different, then the two sides have different grits.
The grit number refers to the number of abrasive granules per square inch. A lower grit number means larger, fewer grains, resulting in a coarser file. A high grit number means smaller, more numerous grains, resulting in a finer or softer nail file. The numbers on nail files typically range from 60 to 1000.
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Frequently asked questions
The grit on a nail file refers to how coarse and abrasive the file is. The numbers on the nail file refer to the size of each grain, with the number telling you how many grains of sand fit into one square inch.
The numbers on a nail file refer to the grit grade. For example, a 180/180 grit file means that both sides are the same and that there are 180 grits per square cm. If the two numbers are different, then the two sides have different grit.
A lower grit number means larger, fewer grains, resulting in a coarser file. A high grit number means smaller, more numerous grains, resulting in a finer or softer nail file.











































