The PetBuckle Truck Tether keeps your dog securely attached and restrained in the back of your truck. It is recommended that you use the PetBuckle Truck Tether in conjunction with the PetBuckle Seat Belt Harness. PetBuckle seat belt harnesses are the industry"s only automotive quality pet travel products, designed to provide crash-tested safety. PetBuckle provides pet owners with the products needed to drive with confidence, knowing their pets are securely restrained. PetBuckle brand safety systems are made with automotive grade components and are tested using the same test equipment used to test restraints found on commercial trucks, child restraints and school buses.