A glass nail file is a nail file with an abrasive surface made of glass, that is used to gently grind down and shape the edges of fingernails. They are often used in manicures and pedicures after the nail has been trimmed using nail clippers.
Also know, what is the grit on nail files?
Any nail technician can do the full range of nail services with just four basic nail files: a coarse file (around 100 grit) for shaping acrylic and taking the length or surface down quickly; a medium file (180-220 grit) for smoothing artificial nails and shaping artificial and natural nails; a fine file (400-600 grit)
What is the use of nail file?
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 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.