Hitch Mount- Solid Steel Rollers - 2-1/2 inch Hitch Bar - Hitch mount skid wheels bolt to the motorhome hitch bar. All required mounting hardware included. No drilling or welding is required, only 2 wrenches are needed for installation. Ideal for use on all sizes and types of motorhomes, including rear engine models. 3 inch x 2 inch Solid steel, roller bearing rollers with zerk axles for easy lubrication. 2 models available. #10-4217 fits 2-1/2 inch square hitch bars. #10-4217-3 fits 3 inch square hitch bars. Sold in pairs.