【Durable Metal Construction】Make from metal materials, these sanding discs ensures durability and reliability, suitable for both professional and home projects 【Secure & Easy Installation】Precision threaded design provides a tight and stable fit, slippage while maintaining high concentricity for smoother operations and better results 【Quick Change Convenience】The rotating mechanism allows fast and effortless disc replacement, saving time and effort during continuous sanding or polishing work 【Complete 20 Piece Set】This versatile sanding disc set includes everything needed for grinding, polishing, and rust removal, offering a comprehensive solution for various surfaces tasks with efficiency 【Portable Storage Case】Includes a compact carrying case for neat organization and easy transport, making it ideal for on site jobs, workshops, or mobile repair needs, Manufacturer: PXZH