Enhanced Carabiner - The dog seat belts adopt enhanced carabiner, which have dual switch design, stronger and more reliable. Adjustable Length - The rope is adjustable. This allows you to get the perfect length, and keep you dog in a proper and comfortable position. Anti Shock Buffer Design - Good toughness and elasticity. It can effectively reduce impact force and protect your dog from sudden braking. Buckle & Hook Integrated - 2-in-1 Dog Car Seat Belt, it can be plugged into the seat belt slot with the seat-belt buckle, or attached to the car trunk with the latch hook. Two Sizes Pro & Lite - The dog seat belts are available in 2 sizes, Pro and Lite. Pro has thicker rope and stronger connectors, good for large dogs. Lite is smaller and lighter, good for medium and small dogs. Safety First - We sincerely recommend you to use a dog car harness when driving with your lovely dog. Keep your dog in position, free from distraction, ensure the safety of you and your dog.