Headrest Restraint Design --- This dog seatbelt (2pcs included) is designed with headrest restraint. It can be used in all models of Vehicle which has headrest. The strap circle which hanging on the headrest is connected by a lockable quick release buckle. The lockable buckle prevents the circle from opening and makes sure your pet safe. Adjust the seatbelt to the max length and grip the strap circle to use it as a general leash. Well Made and Perfect Details --- The lockable quick release buckle of this seat belt is sturdy and the hardware is all metal while the straps are made of durable nylon. The reflective stitching design makes it great for night time use. The elastic bungee helps dog prevent jerking with sudden movement. Keeping Safe and Comfortable --- The dog accessory helps to ensure the safety of your pet and prevent you from distracting when driving. It allows your dog to sit, stand, lie down comfortably or reach to see out the window but keep the dogs from jumping around in the car. Easily to fasten it onto the dog harness via the 360 degree rotation metal buckle. Easy to Use and Multifunction --- The pet car travel accessory can be hanged on the headrest easily and the rotation metal buckle connects the dog harness. It also can be use with the pet seat cover. Its not only a pet seatbelt but also a general leash. Adjustable Length --- With buckle on the straps and the elastic bungee inside, this seat belt can be adjusted from 20 inches to 27 inches and can be stretched to 32 inches for the maximum length. The circle can be adjusted from 16 inches to 24 inches. Good adjustable length so the dogs can get themselves comfy without restricting themselves.