Super fine grit salon professional quality nail buffer. Ideal for smoothing ridges and buffing natural nails. Washable and long-lasting. The 220 grit (black side with logo) is suitable for gently buffing natural nails and smooth out any rough edges. This side should also be used to scuff the top seal off your artificial nails before removing them. The 320 grit (plain black side) is a super soft finishing buffer to get rid of any scratch marks that may remain on the nails. This is ideal for removing any ridges or imperfections. 320 grit is very smooth and kind to the skin surrounding your nails. The padding on the buffer softens impact on your nails for kind, gentle buffing whilst the curved edge follows the natural curve of your nail.