Drain Cleaning Attachment Head Type Chain Knocker Compatible Cleaner Series Ridgid K9-102 Connection Size 1/4 in Maximum Drain Line Inside Diameter 1 1/2 in Minimum Drain Line Inside Diameter 1 1/4 in Product Type Knocker Compatible Cleaner Manufacturer Part Number 64263 Application Pipe Wall Cleaning Cutter Length 1 1/2 in Cutter Type Chain Knocker Features For Hard-Walled Pipes For Wipes Scale Roots and Soft Blockages Fits Brand Ridgid For Use With K9-102 FlexShaft(R) Machine