They are quality built. Do they work? Yes. However, they do not fit into the openings on the top of the lock and ride rails. You have to slide them into the ends rails. That means you have to remove parts of the UTV or the rail system to install them. Ihave a roof rack, that is too much work. And if you want to move them to a different rail, you have to do it all over again.
If they would have milled the lower blocks to fit of hole, they would be great.
I hope this helps.
