It only appeared on Leister Welding Seam Tester 111mm model of the Victorinox Swiss Army Knife.
The tool is primarily used for non-destructive overlap weld testing on thermoplastic roof membranes made of PVC, TPO, etc.
The multifunctional weld tester, developed by Leister in collaboration with Victorinox, also includes an integrated bottle opener; and the tool tip also can be used as a flat screwdriver.