Shop RIDGID FlexShaft Drain Cleaning Machines & Accessories including penetrating tips, ball heads, drop heads, nylon brushes, cables, chain knockers, and more.  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.