This NailPerfect Premium Jumbo File has two different sides, 150 grit side and the 180 grit side.
150 Grit - This side can be used for shaping the nails after placing the product. It can also be used for blending in tips.
180 Grit - This side is used as a step in the degradation of the filing process. The grit eliminates deep lines in the product before buffing. This file is also suitable for filing the natural nail during the preparation procedure.