The Weld seam testing tool is an unique tool patented by Leister Company.
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.