Steel Dragon Tools K60 Sectional Drain Pipe Cleaning Machine fits RIDGID C1 (5/16"), C8 (5/8") Cable Clean large and small drains. Easily cuts large roots. Compact, versatile, and easy to use. Cable spins at 400 RPM and stops immediately upon release. Drain Line Capacity Inner Diameter: 3/4 in. - 6 in. Fits sections of RIDGID 5/8-inch cable (C7, C8, and C9)