Features: Various Mandrels: The rivet nut tool equipped with 6pcs interchangeable mandrels, m3 m4 m5 m6 m8 m10. Multiple Rivet Nuts: There are 200pcs rivet nuts of different size for you to choose, m3 m4 m5 m6 m8 m10. You can choose the most suitable one for your work. Durable: Medium riveting nut tools are made of thick carbon steel with a heat-treated surface that prevents corrosion and gives the tool increased durability and strength. Portable Case: All components are packed in a sturdy compact carrying case for easy storage and carrying. Each tool is tightly fitted in its place to prevent moving around and scratching. Wide Usage: Provide a customized fastener solution for wide riveting applications, such as body panels, bicycle attachments, furniture and decorations, especially for off-road or Jeep modifications.