X5 ADAPTER PLATEX5 ADAPTER PLATE DOUBLE LOCK TO 5TH WHEEL SQUARE SHANK Converts B&W gooseneck hitches to 5th wheel base rails For use with CURT and competitor 5th wheels up to 20,000 lbs. Square shank for use with gooseneck hitches with square ball hole Industry standard base rails accept 5th wheel hitches and rollers Protected by a highly durable carbide powder coat finish No assembly or tools required just drop it in, lock it and go Co cured in a rust resistant