"When you use your vehicle to haul heavy cargo or tow your camper, boat, or work trailer, your factory leaf springs come under load and flatten out. Driving with your suspension in this position causes your truck to easily sway or wobble, making control difficult. Adding SuperSprings suspension stabilizers will eliminate this condition and put you back in control! As you add load to your rear suspension, these helper springs will be activated through the rollers on each end. This keeps your leaves from flexing as much and prevents excess sway, giving you better control when towing or hauling big loads. SuperSprings simple design ""deactivates"" automatically when your not hauling or towing since they only come into play as you add tension to your rear suspension. SuperSprings come in several different lengths to fit a variety of different sized leaf springs. They are also made in light, medium, and heavy duty strengths to fit your specific needs. | SuperSprings Leaf Spring Helpers SSA42"