The Reese Friction Sway Control uses friction to resist pivotal movement and thereby works against the effects of induced sway. It operates on the principle of 'stiffening' the coupling between the tow vehicle and trailer. The degree of 'stiffening' or friction is adjusted to suit various trailer weights and towing conditions. The sway control's operation is simple and uncomplicated. It doesn't prevent the generation of sway; it simply works to resist the forces once they have started. The sway control is used to reduce trailer sway and improve handling in adverse towing conditions. Sway control units dampen trailer sway caused by crosswinds and traffic. Both friction and dual cam designs improve stability and increase towing safety.