With this clip, an ActionCam can even be easily attached to the windshield of my motorcycle. The angle or thickness at which the clip opens is decisive for this. This clamp is designed for very thin materials, which is why it sticks fairly flat on the windshield and distributes the force well. With my shower cubicle (7mm thick), for example, it doesn't work quite as well anymore. The disc is too thick for the clip. Although it still holds, it does not close perfectly and is stuck in parallel, but a gap is then open. I would estimate that the optimal thickness for mounting is around 3-4 mm. The clip is also magnetic. However, I strongly advise against using this method for dynamic shots on a car or motorcycle tank, as the photos in the product description suggest. The magnetic holding force is not really strong. As shown in my photos, when attached to a vertical surface, the magnet works best lengthwise, but not crosswise. All relevant surfaces are rubberized and protect the surfaces to which you attach the clip, whether via the clamp mechanism or magnetically. So I can say that the bracket is good. The magnetic mechanism so-so and you should only use it for static shooting, i.e. not on a car/motorcycle while driving. All in all, a solid, solidly manufactured product that can be used flexibly. With this description and my photos, I hope to have provided some useful input for making a purchase decision.