This tool is an abrasive implement used in manicures and pedicures to shape and shorten artificial or natural fingernails and toenails. The 80/80 designation indicates the coarseness of the abrasive surface on both sides; both sides have a grit size of 80. A lower grit number signifies a coarser texture, making it suitable for significant material removal.
Its aggressive filing capability is beneficial when working with acrylic nails, removing gel polish, or rapidly shortening natural nails. The coarse texture allows for quick and efficient shaping, reducing the time required for such tasks. Historically, similar abrasive tools have been used for nail care, but modern versions offer consistent grit levels and durability.