The Astro Pneumatic Hand Rivet Nut Kit, No. 1443, offers mandrels, aluminum nose pieces and rivet nuts in seven different thread sizes - 1/4-20, 10-24, 10-32, 8-32, M6, M5 and M4. The rapid-change mandrel design allows the user to push to install and pull to remove. The unit is built with unique leverage multiplication for maximum rivet nut setting capabilities, and includes an adjustable stroke.