Serving the coal industry for more than 50 years, Petitto Mine Equipment, Inc. specializes in the manufacture of heavy duty, crawler track mounted longwall move equipment. Petitto has set the coal industry standard for longwall shield retrieval in the United States for the past 30 years. Representing equipment utilization in over 90 percent of all longwall mines in the United States, the Petitto Mule Longwall Shield Retriever, the Petitto Mule Haul Longwall