CURT CrossWing 5th Wheel Safety Chain Assembly with Rail Anchors Model 16612CURT CrossWing 5th Wheel Safety Chain Assembly with Rail Anchors Model 16612 This 5th wheel safety chain anchor assembly provides a backup connection between your truck and 5th wheel trailer. The chain bracket bolts onto the CrossWing head piece that mounts onto your 5th wheel kingpin. When hitching up your trailer, the chain hooks link up to the 5th wheel loops anchored into the industry standard rails in your truck bed. This kit includes the safety