The file is made of paper material and has a straight shape, making it ideal for shaping and correcting imperfections on natural nails, as well as on acrylic or gel nails. Additionally, it has a hardness of 100/100 on both sides, providing uniformity during use. Ideal for shaping the side walls of artificial nails, it should be used with caution, as it is not recommended for shaping the body of the nail, as it may cause deep grooves.