Small Opening Tool, Head Type Opening Tool, Compatible Cleaner Series M18 Sectional Machines, Connection Size 7/8 in, Maximum Drain Line Inside Diameter 4 in, Minimum Drain Line Inside Diameter 3 in, Product Type Cutters, Compatible Cleaner Manufacturer Part Number 2818-20, 2871-20, Application Sectional Machine Cables, Compatible Cable Core Type Open Wind, Compatible Cleaner Grainger Part Number 55NJ55, Cutter Type Opening Tool, Features RUST GUARD Plating, For Use With 55NJ55, Material Steel