Fingernail smoothers, also known as nail FILES, are tools used to shape and smooth fingernails. They come in a variety of shapes and sizes, and can be made from materials such as metal, glass, or plastic. The most common type of nail file is the emery board, which is made of an abrasive material that is used to gently buff away rough edges and ridges on the nails. Fingernail smoothers are essential for keeping nails healthy and looking their best.