That part is good and the iPhone 6 Plus sits with shell, in this case of Spigen, secure in the bracket. As already wrote another buyer here, adapting to the width is a game of patience, since it should still be a better way. Otherwise, this holder is a quality product that works very well in conjunction with the requisite typical vehicle from Brodit ProClip. Thanks ball joint you can adjust the brackets as you want.
The installation or assembly had to cope with problems due to the good description for artisanal halfway gifted, but you should the holes in the ProClip at which the holder is attached, pre-drill.