Kurgo Auto ZipLine for Dogs, Dog Safety Restraint for Car, Boat or Campsite, Quick & Easy Installation, Adjustable Length, Black/OrangeEasy installation: Zip Line can be attached between any two fixed points in your vehicle (eg; two seatbelts, side ceiling handles or in cargo area of an SUV) Whats included: Package includes zip Line, adjustable leash tether and two carabiners a large one that moves along the line itself and one on the end of the leash Recommended use: Better if used with a dog car harness, such as Kurgos Tru Fit Smart Harness (sold separately) International products