Astro Pneumatic XL Nut/Thread Setting Hand Riveter Kit 1/2" Cap.Astro Pneumatic XL Nut Thread Setting Hand Riveter Kit 1 2" Cap. Features and Benefits: Makes setting extra large rivet nuts like 1 2" and M12 a breeze Includes six interchangeable mandrel nosepiece sets in Metric and SAE sizes: M8, M10, M12, 5 16", 3 8", and 1 2" Tool less Quick Change Head design allows for easy changing of mandrels and nose pieces by hand Disassembly of the tool is never required, the unique spring loaded inner hex sleeve