By employing the strength of the triangle, Lippert JTs Strong Arm Jack totally eliminates annoying chassis movement to create a rock-steady camping experience. Easy to install, one end of each stabilizer attaches to each of your landing-gear legs to form a triangle. Bolt-on installation, so theres no welding needed and no need to remove and reattach during each setup. Patented and universal system works on three kinds of jacks found on RVs: scissor, front landing gear and telescoping. Comes with everything needed for installation. Available: JT Strong Arm 58 Fits 5th wheels with landing gear separated by 58 or more. JT Strong Arm Kit Fits most travel trailers. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Jacks.