The Edge Nails Zebra File 100/180 is perfect for surface work due to its softness on cuticles. It is also recommended for filing the edge of the nail and are ideal for use on fibreglass. The file is made of Zinc Stearate and is a popular choice when filing acrylics as it resists clogging. Place the nail file under the nail edge and file in one direction. Ensure nail is dry to allow a smooth finish.