Thomas and Friends HO Scale Thomas the Tank Engine is ready to pull all passengers and freight all over the Island of Sodor. This engine is a standard DC electric train. It features metal wheels and hook and loop couplers that are proper for these style trains. This engine is not compatible with regular HO Scale couplings. These are a great gift for any Thomas fan with their own layout of Sodor. This engine is 4 inches long and has moving eyes.