I've had one on my truck for about 8 years. It seems to help
quite a bit. I have a "Rock Solid". It mounts on the ball hitch
( I don't think I said that right). Anyway,all I have to do is pull the pin and slide the hitch and rock guard out of the receiver. I don't
remember where I bought it. I think I got it from ,"Cabela's".
Camping World,sells them as does ,Bass Pro Shops. They
aren't hard to find. When I bought mine,I paid aroubd $50. 00.