The rod is held together for easy transport, and the spring force increases the load capacity. Product Features: The load capacity is increased by about 1.7 times the spring force of the original model (*According to our research). Compatible with multiple and heavy rod mounting. In the past, since each rod does not come into contact with each other and every rod is placed. The cushioning of the rod reduces damage when the guide gets caught by accident. The lime green color with good visibility. How to use: Remove the headrest and pass it through the loops on both ends of this product, and return the headrest to its original position. By using a carabiner or cable tie, you can connect this product to extend its length or attach it to the handle of the car.