The knobs and brackets are super solid. Snug fit on my LC200 OEM roof rack. I immediately put them to the test on a two day road trip. Huge upgrade to my previous set up.

I really liked them but you need to include washers so they don't get bound up by the carpet and crush the fiberglass.

However, does not fit my older rooftop Packasport unfortunately. Factory holes are spaced closer together on the old school boxes.