Review on CyberTech Replacement iRobot Roomba 3 Armed Side Brushes for 500, 600, 700 Series (Excluding 645, 655, 675 & 670, 671, 690) by David Bone

Caution. The screw that holds these brushes in place has a different thread than the factory screw and the factory screw will not work with this brush. This screw holds the brushes in place, but risks tearing the plastic gear and needing to be replaced. Unfortunately, until irobot or a third party sells a replacement gear, removing the gear will require replacing the module. iRobot's customer service has been excellent in sending out a replacement module, but it's a bit overkill since all you need is a gear. Please check the product photos carefully.