The industry standard spring cleco with a 0-1/4" grip range.
Spring-loaded fasteners temporarily hold layers of sheet metal tightly together for drilling, adjustments and rivet installation.
Van's Aircraft stocks 3 diameters.
Color-coded for easy identification. Install and remove these spring clecos with cleco pliers or the pneumatic spring cleco installation and removal tool.
12 ofis the minimum necessary to build a two-place RV, but it's impossible to have too many. Quickbuilders may get by with fewer...but ending up short is frustrating and they aren't that expensive.
Made in USA.