Below is a list of Drum Crushers manufacturers from Harmony, Minnesota. Drum crushers are a type of baler or industrial compactor used to compact, or crush, containers and drums that are used in the storage and transportation of liquid or loose raw materials. Commonly used drums hold 55 gallons or 25 gallons and are made of metals, fibers or plastic. 55 gallon drums are used widely in shipping and transportation of goods, and are a necessary part of many industries.