First: Which discs these things are supposed to fit? So small cars there's probably not. It always comes somewhere from the sun. OK, the dimensions we know in advance, but comes to: Assembly is totally fiddly, always depends somewhere by what. Does not look good. These also come that they unfortunately can not pinch the top of the disc if you have electric FH. The hooks are much too thick, so that the wheel always at start-up detects an obstacle and shuts down again. So not useful.