Improved efficiency: The rivnut tool's 16" long handle is made from high quality carbon steel material that is ergonomically designed for faster and more efficient installation of rivet nut, saving you time and energy on your projects. Complete kit: In addition to the rivet nut tool, it includes 13 interchangeable mandrels in sizes M4 M5 M6 M8 M10 M12 8-32 10-24 1/4-20*2pcs 3/8-16 5/16-18 1/2- 13, 130 rivet nut assortment kit and a case for easy storage and transport. Easy to use: The IMQUALI nutsert tool kit has a comfortable grip that reduces hand fatigue, allowing you to work for long periods without discomfort. The tool's interchangeable mandrels can be changed at any time without the need for additional tools, making it easy to switch between different sizes and types of rivet nuts. Versatile: This rivet nut setter kit can be used to fasten and rivet various metal pipes, sheets and other materials, making it suitable for a wide range of applications in the aviation, automobile, railway, refrigeration, switch, elevator, instrument, furniture and other industries.