Avoid - spend more. Very Disappointing
They say you get what you pay for. In this instance I got broken parts when I opened the packaging when I went to fit these to the car. The plastic turning knob was broken off and the plastic clamp had split down a seem! so wasn't functional at all. These are cheap and dangerous in my opinion. To be honest I wouldn't feel confident they would actually stay on the roof rails when fitted. I could imagine them disintegrating as you drive along. I will be returning them due to receiving faulty / damaged goods. Really disappointed that GoOutdoors actually stock these and see them as a quality product that befits their own quality brand.
I would have give them 0 stars but I can't, so it had to be 1.