The Earth Therapeutics 3-SURFACE NAIL SHINER contours and polishes nails to a healthy shine. To start,>/b> use the coarse black side to plane down any uneven edges. Then attend to the finer details by using the white side marked smooth to gently buff down the nail surface. Apply the final touch by using the gray side marked shine to polish nails to a radiant finish. 70481SKU 73377071355