What is a "nail buffer"?

A nail buffer is a tool used for smoothing and shining the surface of the nails. It typically consists of multiple abrasive surfaces or pads with varying levels of coarseness. The coarse side of the buffer helps to shape and refine the nails, while the finer sides are used for polishing and achieving a glossy shine. By gently buffing the nail surface, a nail buffer can help remove ridges, create a smooth texture, and enhance the natural luster of the nails.