[Bulk purchase]: 10 pieces of black straight nail file sandpaper per package. These files can easily help trim your nails to the shape or length you need. [Double sided]: 100/180 Grit can make your nails lighter without damaging them. The round top and double-sided design are adopted, the surface is sandpaper, and the middle layer is foam. [Washable and reusable]: It is fast and easy to clean with water, and can be used for many times. File the hard nails and toenails into 100 pieces, and use 180 pieces to smooth the edge of the nails to make the shape more refined [High quality material] - The nail file is made of high quality adhesive tape and carborundum plate material, which can trim and shape the nails to the desired shape or length without damaging the nails. [Features]: There must be professional nail salons and DIY nail salons at home, which are suitable for girls or women who like nail salons, and for girls or women who like nails.