Specifications: 100/180 Features: Article crude fell for uneven nail surface has obvious treatment effect, can nail a flat surface uneven treatment, re-use polishing strip, make your nails an instant brilliance bright. Usage: 1. And nails was 90 degrees, toward the center of the nail, what about grinding, do not back and forth grinding, easy bruising nails. 2. The thicker the material, easy to break, it can be directly used to repair the nail length and shape.