They mount to the side of your TD so the top of the bracket is level. You then mount your Yakima or Thule cross bars to them , then a roof rack, bike carrier or I was going to mount a roof top tent like this
New these are $55.00 for a pair, I also had the bracket extended at the cost of $20.00 each. I'll sell the 2 pairs (4 brackets) $90.00 + shipping.
