The Excellent Pro Premium Zebra Boat File Nf21 is ideal for professional use in nail care. Made from paper material, this file features an ergonomic crescent shape that contributes to precise application during filing. It has two sides with different grit levels, 150 and 180, allowing you to choose the appropriate one for each need — the 150 side is coarser, ideal for shaping and smoothing, while the 180 side is finer, suitable for finishing. This file is perfect for preparing the natural nail before applying acrylic and gel.