Powder coated aluminum “Wheel Stand”. This is primarily used for RV’s under the tire. You simply park one of your tires on it and set the brake, then drop your flagpole in the hole!  The wheel stand plate is 30″ long x 8″ wide.
Don’t forget the Reducer Sleeve for Mounts if your pole is a 15′ or 20′ LT (2.5″ base).