This square-shaped paper nail file is ideal for polishing the natural nail plate and acrylics. It features two sides with different grits, 100 and 180, which means one side is coarser and the other is finer, providing convenience in nail shaping. Whether you want to shape natural nails or prepare the surface for acrylic or gel application, this file is the right choice. The package includes 12 pieces, ensuring you always have a tool available for your needs.