The Ezy Dog &0 Click&0 Dog Car Restraint is effectively a seat belt for dogs. Simply attach to your dog&0s harness & &0click&0 the buckle into the seat belt socket & your dog is restrained in your vehicle. It uses the same type of webbing that is used on car seat belts so is tough & strong. The &0 Click&0 Car Restraint has &0 Tri Glide Adjustment&0 so can be used for both small & large dogs. This also means that you can give your dog as much room to move as you wish. You can connect the &0 Click&0 to any Dog Harness (Although Ezydog recommend an Ezy Dog Quick Fit or Convert Harness) CAUTION: In the event of a car accident this product may not prevent injury to the passenger or dog. DO NOT USE IF DAMAGEDPlease note: The &0 Click&0 does not work in the Volvo range of cars.