Designed to work with the Kurgo Tru-Fit Smart Harness (sold separately), this extra seatbelt loop is a great addition for families with multiple cars who want to leave the loops in place in each car. It offers a universal fit and steel attachment clip. Kurgo is dedicated to helping people and their dogs get out and enjoy the world together. Their line of award-winning dog travel and outdoor products include everything from crash-tested car harnesses to car seat covers to outdoor products like dog backpacks and boots. If you have any questions or concerns about our products, please contact Kurgo and we would be happy to assist you!