The RIDGID C-22 (89405) 5/16 in. x 50 ft. Cable with Drop Head Auger is ideal for cleaning 3/4" to 1 1/2" drain lines. The drop head auger easily leads into down drain pipes; it is particularly helpful for cleaning back-to-back mounted fixtures and severe bends. The cable has a hollow core design that provides maximum flexibility for severe bends and "P" traps. It is suitable for use with K-40 and K-45 Sink Machines, as well as the K-50 Sectional Machine.