See other customer reviews that have pics for a better understanding of the design. The top selling points are that it is VERY strong. The largest, heaviest phone should not move. Lastly and most importantly, the bit that attaches to the vent is not just a couple pieces of plastic that you have to wedge onto the vent. It actually has a spring-loaded button that you press to open the jaws, and the spring force that clamps to the vent is VERY stiff. Great value for money in this.