Check the listing for details. Curt-Round Bar Weight Distribution Hitch Hardware Kit. Color: Silver, Condition: New, Made in China. Listed at 52.99 USD. MUST READ FITMENT NOTE: || Description: Includes replacement hardware for CURT round bar WD hitches The CURT weight distribution hitch is a specialized towing system that provides improved vehicle and trailer control by leveling the trailer and more evenly distributing its tongue weight across the trailer's and vehicle's axles. Weight distribution hitches are commonly used on travel trailers and campers but can also be applied to other large loads. This replacement hardware kit for round bar weight distribution hitches with integrated lubrication includes the necessary hardware for attaching the weight distribution head to an adjustable shank. It includes bolts, an adjustment pin, washers and a pin & clip. .