1.Smart design:7 sides different level of grit designed and each grit has been carefully selected. The design of different colors on each side is full of beauty. You can buff and shine your fingernails with just one nail file. 2.Terrific Gift:With EVC+Emery board materials. File your natural nail or fake nails.Its the perfect gift for your friend. Also fit for Pet Grooming. 3.Reliable material7 Surfaces with different level of smoothness are designed to combine nail file and nail buffer together. Trim to your desired nail sharp and give your nails a healthy shine. 4.Easy to use:Each side is numbered for the order to use and shows the function of each surface.Ideal for trimming your nail sharp and length, removing nail gel, filling and buffering nails, grinding off UV gel or acrylic nail, etc. 5.Scope of application:Washable sanding blocks, it can be cleaned with water and used repeatedly, suitable for professional use,used for finger and toe nails.It can be used for home and travel,also for nail salons and home nails