This is a simple neodym magnet holder designed to fit onto the stripe above the radio on BMW e46's dashboard. I attached a thin, 0.3 mm metal stripe to my iPad's cover to fix it to my car's dashboard as easy as I can, without any drilling of the car. The magnet holder stripe was fixed to the car by using 3M's VHB tape.
I used 10x8x30 mm neodym magnets to the final model. They are strong enough to hold the 10 inch iPad in place in case of the most extreme conditions.