The 'Q' in Q Towers stands for the quadruple movement capability of the tower and the clip.  So the four degrees of freedom allows them to fit your car like custom-tailored underpants.

       Die-cast interior for solid, sturdy anchor

       Ball-and-socket mechanism adjusts to all contours of your vehicle.

       Add vehicle-specific Q-Clips to ensure a custom fit to your doorframe (Do not confuse Q-Clips with similar-sounding personal hygiene products. Attempting to clean your ears with  Q-Clips may result in serious Vincent Van Gogh-like injuries.)

       Upgraded for easier and faster installation

       Sold in sets of 4.