This is a genuine KitchenAid drive coupler, the drive coupling is the small black piece that sits on the top of the base of the blender and spins the blades. The drive coupling will have 6 teeth on top and looks like a crown. The drive coupling is a very common replacement part on KitchenAid Blenders, and is used as a self-sacrificing part to protect the motor and other parts of the blender from breaking. This piece will fit KitchenAid blenders that models start with KSB5 or KSB3. (Will not fit the KSB560)
The drive coupling, 9704230 is reverse threaded onto the motor shaft and can easily be replaced, click below for the Instructional video on how to remove the motor clutch.