Rigid Swivel Caster Hitch Mount - Hitch mount skid wheels are designed to bolt to the motorhome hitch bar. They include all required mounting hardware. No drilling or welding is required, only 2 wrenches are needed. Ideal for class (C) and front engine class (A) motorhomes, up to 30 feet. Swivel, hitch mount casters fits 2-1/2 inch hitch bars only. 4 inch x 2 inch metal wheel. Sold in pairs.