Adjusting tool for aero wipers

• The non-iron windshield wiper generation from Bosch, Valeo, SWF etc. known under the trade names "Aerotwin", "Flat blade" etc. require special measuring and adjustment tools.
• The wiper blade holders on the wiper arm must have a precise, predetermined angle to the front or rear window. Use with:
  • rattle / rub / squeak the wiper blades
  • poor and uneven wiping result
  • Disc change
• It is imperative to check the angle after each pane change, because the angle was changed with high probability by installing the new pane.