Our 4" Root Cutter is designed to cut through roots inside the line. This drain pipe root cutter is best used in 4"- 6" pipes. The pipe root cutter has a steel construction and Rust Guard™ plating that prevents corrosion, providing you with longer-lasting head attachments. This head attachment works with 7/8" Open Wind Sectional Cable designed for the MILWAUKEE® M18 FUEL™ Sewer Sectional Machine with CABLE-DRIVE™