This tablet holder is made from quality plastic material at the ball joint which is really appreciated. Too many mounts i've used have a cheaper plastic that has too much flex in it so that even when you tighten down the knob, it has a bit of flex in it, or it will outright not hold the weight without slipping. This mount has no such problems, the ball joint is more of a matte look to it rather than polished which helps keep good friction. The bolt used to hold the adjustment joint is heavy duty, so i have no doubts in its longevity if i need to loosen and tighten frequently.
The holder part of the mount uses rubber instead of foam for where it hold the sides of your tablet which is super nice and sturdy holding. The jaws of the holder have quite a good range of adjustments to hold a lot of various sizes of tablets.