NBM
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Filters
- 180/240: The values indicate the grit of each side of the file. The 180/240 means it has different grit and texture for each side.
- 240/240: As the grits increase, the hardness decreases. 240/240 means it has a fine texture.
- 80/80: It determines the hardness of each surface of the file and is measured in grits. 80/80 means it has a coarse and rough texture.