The Model R Drain Cleaner is professionally engineered to clean 3″-6″ drain lines for distances up to 100ft. The unit features a heavy duty 1/3HP motor, extra large steel tubing frame, and snap-lock tool connectors which eliminates screws rusting or losing a tool in the line. The Model R also features the industries toughest 5/8″x100″ Tr–Max cable with added flexibility and reduced kinking. A typical application of the Model R is a mainline running from the house to the street