Blue Ox 550 lb Kit Spring Bars BXW4005 14-5275

550 lbs. Spring Bar Kit. If you switch trailers, do not buy a new hitch, just buy the bars. All head assemblies for SwayPro models are the same, but interchangeable spring bars allow an increase or decrease in capacity for proper towing. Beveled ends lock into place with a spring pin without grease for clean use and storage.