Bosch was the first to launch the joint-free wiper blade Aerotwin on the market. By 2004, the tenth millionth Aerotwin rolled off the production line for original equipment. More and more vehicle manufacturers are adopting Aerotwin technology. Flat and elegant, the high-tech spring rail in the Aerotwin replaces traditional joint and bracket constructions. It is precisely adapted to the curvature of the windshield of each specific vehicle. For the retrofit sets, the curvature of the spring rail was specially calculated for the windshields of these cars. The mounting technology with the clip adapter allows the flat Aerotwin wipers to easily snap onto the common hook arms. Simply hook the wiper arm into the adapter – changing the wiper blade remains just as easy as before.