[QUALITY MATERIAL]：stedi ultra fine polishing files is made of high quality tempered glass, high hardness and good wear resistance, specially designed for sanding and polishing, maintains excellent sanding results after long periods of high-frequency us [WASHABLE & REUSABLE]：After use, the file can be washed with water and cleaned with a brush to restore the sanding effect and reused, each file is equipped with a separate box for protection, easy maintenance and safety [CAN BE USED FOR WET&DRY PURPOSE]: stedi ultra fine polishing files not only can be used for both wet and dry purposes, but also has a variety of different shapes designed for different parts of the shape of the sanding. In addition, it can be used as a sanding stick with adhesive sandpaper [WIDE RAMGE OF APPLICATION]: Suitable for hobbies modeling tools, gundam, military, wood, plastic parts, 3d resin parts, PLA [100% SATISFACTION]: Please check the package content as you received the product. At STEDI, we focus on product quality and value the shopping experience of our customers highly. Whenever you have a question, please feel to contact us