Ultra-Fab 0138.1136 48-979018 Hitch-Mount Solid Steel Rollers - 3" Hitch Bar Hitch mount skid wheels Designed to bolt to the motorhome's hitch bar No drilling or welding is required, only 2 wrenches are needed Ideal for use on all sizes and types of motorhomes, including rear engine models 3" x 2" Solid steel, roller bearing rollers with zerk axles for easy lubrication