The RIDGID FlexShaft® Knocker K9-306 is an essential tool designed for efficient drain cleaning, specifically for 4″ (100 mm) drain lines. Featuring a carbide tip and a sturdy three-chain configuration, it effectively removes grease, soft blockages, scale, and roots from the pipes. This advanced knocker not only cleans wall-to-wall but also utilizes nylon and steel brushes for light grinding and prep work during relining applications. Backed by a full lifetime warranty, this reliable yet versatile tool ensures optimal performance and durability on any job site.








