Belt Driven compressors are capable of producing greater CFM than a Direct Drive compressor, so if your project, or work situation calls for heavy-duty use, (many hours of use over several days) then a belt driven air compressor is the way to go. All belt driven compressors operate via belts and pulleys; this operational technique provides greater efficiency, while delivering larger amounts of air for consumption. Draper Tools stock a variety of belt driven compressors sizes, ranging from 50L through to 270L.