Hitch Stabilizerinstall correctly and it can stop rattling, wobbling, rocking and significantly reducing noise.Easy to install, after insert the tube, lock them directly by U-bolt and plate, put on original spring washers, flat washers and fasten by nuts, then done. If the hitch is low, and there is a risk for U-Bolt to scrap ground, lock the tightener from the bottom.Follow the picture to install it and also can be mounted from the bottom. | thick squares steel tube thick squares steel tube with protective powder paint finish.Fits for 2'' inch and 1.25'' hitches. only.Before purchasing, please check the size of your car's hitch receiver.Note: Not compatible with RVs, trailers, or any kind of Class B vehicles Optional hitch extender needed for cars with spare tires. | Durable design Durable design includes a built in anti-wobble hitch device to keep bikes in place | Easy folded down When bikes are unloaded, the center post and hook arms can be folded down flat with the push of a button for quick and easy access to the vehicle back hatch. |