They seem like a great product at first but they do not stand up to use. I had 3 that all broke in the same place, right on the stem near the ball, within a few days of being in my vehicle! When I contacted customer support, they asked for pictures which I immediately sent. It has been 9 months and no replacement or refund! Now I had another one break and they say I am out of the 90 day warranty period! It would be a great product if they were well made, but they are not. Don't waste your money!