Pickup truck ladder racks - STX

I have two un-assembled ladder/kayak racks for pick up truck. I bought them around a year ago, bu thave never pu them to use. They mount on one side (I had thought of putting one set on each side of my truck, but never got around to it, nor expect to now) KargoMaster brand. The are designed to be removable when not needed. $40. each