A nail file is a handheld cosmetic tool with an abrasive surface used to grind down, shape, and smooth the edges of fingernails and toenails.
The curved, wide shape shown here is commonly known as a banana file or boomerang file. This curved ergonomic shape provides better control and comfort, making it easier to follow the natural curve of the nail cuticle without scraping the skin.
Material: It consists of an interior rigid plastic core cushioned by foam and coated with a green, sandpaper-like grit.