Keeps everything off the ground and easy to reach. Safety chains mount on side hooks. Electric brake cable hooks into hole. 7 way harness clips into holder. Includes plugsaver. Easy to install. *chains not included * make sure to take out inserts when installing on 2 1/4" tongue jack *intentional gap between front and back parts for a snug fit *install with a screwdriver. *7 way Clip must be installed before mounting to jack* Made from Polypropylene