1. 7 different levels of grip design, allowing you to polish and gloss your nails with only one nail file, without buying too many tools, saving you time and money.2.Made of EVA and emery board materials, it is durable and will not easily break and damage. It is suitable for your natural nails or fake nails, and it is also suitable for pet grooming.3.Easy to use, each side is numbered in the order of use, and the functions of each surface are displayed. It is suitable for professional manicurists or beginners in nail art to learn how to use nail art.4.Safe materials are non-toxic and harmless, have no allergic ingredients, will not cause damage to your nails, are skin-friendly and safe to use.5.Nail files are small in size and light in weight, easy to carry and store, and can be carried in bags without taking up too much space.