The RIDGID C-75 (41212) 3/4 in. x 75 ft. Inner Core Cable is ideal for cleaning 4" to 10" drain lines, including laterals and main lines. The powerful cable can be used for heavy-duty blockages such as tree roots. The cable will tighten on its core to provide extra stiffness under load, while also delivering high power to the cutter. The cable is suitable for use with K-750, K-7500, and K-750R Drum Machines.