The Hellwig LP-15 helper spring line fits the Mid-size and Small pick-up groups. Manufactured with heat treated ASTM 5160 alloy spring steel in our California based facility, these units increase your vehicles level load carrying capacity up to the manufacturer?s Gross Vehicle Weight Rating.Featuring heavy duty components and easy to read installation instructions this helper spring line-up does a lot of work for its size. Simple bolt on design using common hand tools provide the installer ease of installation and the vehicle owner hassle free use. Packaged in one kit, this unit comes complete with plated and powder coated components, spring leaves, heavy duty hardware and installation instructions to make this unit easy to install and use. Fine tune your vehicle?s leaf spring suspension to suit your particular needs by adjusting the heavy duty U-bolts provided. If your tow and haul needs change, simply adjust the heavy duty U-bolts to suit the new requirement. Once installed and adjusted you are free to haul and/or tow a multitude of equipment and commodities with greater control and stability.