The material seemed very good. The issue is that they write that it fits all bars but it doesn't fit mine (I have thule bars). The distances between the grips are small and it can't hold the bar. So for me they are useless since they can't be installed

Very good for its price,
however, for my bike
29 CM. It doesn't fit because the middle clamp doesn't reach to attach to the bike frame, as the bike is taller than I thought it would be.
But it is very good for its money, regardless of not fitting my bike, and I will sell it.

Honest solution, which has no rival for its price!
Sturdy and stable, screwing both above and below the bicycle frame (for trips on the highway).
The only complaint is that the screws may come off when unscrewing the black rotating plastic parts that attach to the frame.
If it were a body, it would be better.