I think it's just for beauty. Although it looks quite thick and impressive in diameter, the stem is held to the mounting adapters by just one bolt on each side. I don't think I'll ever tow my car or try to get it out of a ditch and attach something to that crossbar, it's bound to bend. Another issue I have is that they put a metal sticker on the front with the word Westin so you have to advertise that I'm not a fan. It is impossible to remove without affecting the appearance as the silver portion of the metal decal will remain on the towbar and will need to be repainted. I don't understand why all these companies think we want to show their name for free and it's not a small sticker it's 6 inches long the full width of one of the bars. I'd rather make it in the US instead of their name, but I doubt it's made in the US, who knows. It is what it is, but I wouldn't use it to work with. I just raised my SUV with a pro kit and these adapters still use the existing bolts and decrease your ride height by about 2 inches. So not a great design. Kind of disappointed.
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