5-in-1 Multi-Function Design Multifunctional design, adjustable grit from fine to coarse from top to bottom. A single large nail file can complete functions for multiple sizes, quickly removing acrylic or hard gel for cleaning, shaping, cutting, smoothing, and removal. Durable Application The nail file is made of hardened caREide and tungsten steel, offering reliable strength, durability, and cutting performance. Low heat generation, less dust, allows quick shaping, polishing, smoothing, sanding, and polishing of gel or acrylic nails. Universal 3/32 Inch Shaft You get 3 different nail file sizes: fine, medium, coarse, suitable for most nail file machines using 3/32 inch bits. Ideal for most gel nails and experienced manicurists or nail art beginners. Easy to Clean caREide nail files are corrosion-resistant and do not stain nails. You can easily clean dust from the bits or nails using a nail brush. Protect the bits after each use to keep your nails and clients' nails healthy.