![FlexShaft® Knocker, K9-204, 4" (100 mm), 3 chain, penetrate<span class=' ItemWarning' style='display:block;'>Item is usually in stock, but we'll be in touch if there's a problem<br /></span>](/vendors/4830/large/109c7adc315745151dc1737ce3a481b1b30f38fa_01.jpg "FlexShaft® Knocker, K9-204, 4" (100 mm), 3 chain, penetrate<span class=' ItemWarning' style='display:block;'>Item is usually in stock, but we'll be in touch if there's a problem<br /></span>")
RIDGID offers a wide variety of FlexShaft® accessories in different sizes for the most cleaning efficiency on the jobsite. Depending on pipe size, pipe material and blockage, there are different chain Knockers and Brushes for every job. Knowing when to choose Brushes or standard, carbide tipped or penetrating head chain Knockers can help you get the best performance out of your machine.
