I looked at these for a while, and read the reviews. My Tahoe has an open rear diff, so I get stuck occasionally.this should provide the traction needed. Will update the review if they fail, but as I bought them as Returned Stock, and they dropped the price even further, I'm super happy. Bought a couple of threaded J hooks and some threaded knobs.easily mounted to roof rack. I do have a cheapo strap on them too as a backup for the bolts, but they are holding perfectly.