Astro Pneumatic Hand Rivet Stud Setter Kit W/ Rivet Studs Metric & SAE 1455 The Astro Pneumatic Hand Rivet Stud Setter Kit W/ Rivet Studs Metric & SAE 1455 works like a rivet nut but instead of female threads offers a male threaded stud you can hang from and tighten down attachments on. This tool sets rivet nut studs in sheet metal to mount nearly anything on and includes the following in five piece each 5/8” long threaded rivet studs: M5, M6, M8, 10-24, 1/4-20 & 5/16-18. Set rivet nut studs in sheet metal to mount nearly anything on. Works like a rivet nut but instead of female threads offers a male threaded stud you can hang from and tighten down attachments on. Sets the following sizes and includes 5PC each 5/8” long threaded rivet studs: M5, M6, M8, 10-24, 1/4-20 & 5/16-18. Great for hanging exhuast, firewall mounting (fuel pressure regulators, catch cans), auto parts repairs (headlight housings, radiator mounts) and more!