"A nail file is a tool used to gently grind down and shape the edges of nails. They are often used in manicures and pedicures after ...
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the nail has been trimmed using appropriate nail clippers. Nail files may either be emery boards, ceramic, glass, crystal, plain metal files or metal files coated with corundum.
A nail drill is a powered rotary tool, which is used by a nail technician to file nails." - (en.wikipedia.org 25.06.2021)