GUBB USA 4 Way Nail Buffer is a combination file and buffer, that has four sides to give nails beautiful, natural shine. Whether at home or on the go, you can easily get beautifully shaped, smooth and shiny looking nails in just minutes using this block. It features 4 sides to help perfect your nails. Side 1 is a rough filing side acts as a nail file for your nail edges. Side 2 removes ridges from the nails to make them even while side 3 makes the nails totally smooth. Lastly side 4 gives your nails a high shine.