The Ryobi Elect. Tools 204912004 Flexible Shaft Assembly helps deliver precise and controlled operation for compatible rotary tools. It works by transferring rotational power from the motor to the tool head through a flexible drive shaft, allowing greater maneuverability and improved access in detailed applications. Made to replace a worn or damaged flexible shaft assembly, it helps r... https://www.wholetoolbox.com/ryobi-elect-tools-204912004-flexible-shaft-assembly/204912004.html