Aligners and Scania standard Checkthread tester: high quality premium stainless steel
Stud hole elongation and conical/spherical testers: glass filled nylon
In garages and workshops as a preventative maintenance measure when attaching the wheel.
Stud hole elongation tester: 21, 24, 26, 31, 32, 33 mm
Checkthread: Scania standard thread size