A nail buffer is a small tool used to smooth and shine the surface of nails. It typically consists of a block or pad made of soft materials, often with different grits on each side. By gently rubbing the buffer on the nail, you can remove ridges and create a polished finish without the need for nail polish. Using a nail buffer can enhance the natural appearance of your nails, making them look healthier and more vibrant. Regular buffing can also promote blood circulation in the nail bed, which may contribute to stronger nail growth over time.