Description: These D-Ring Sliders help organize your cargo by mounting on the U-Rail in the rear cargo area of your SRX for tying down cargo to prevent shifting while in transit (set of 4). Transport your cargo more securely with these Tie-Down Rings. They mount on the horizontal rails in the cargo area of your vehicle and are perfect for tying down cargo, preventing it from shifting while in transit. D-Rings for Utility Rails.