The tree brushes (D&E) work well on spoke wheels or alloy wheel with very small inlets that a regular brush will not reach. The brass bristle brush (A&B) work well on whitewalls. The nylon bristle brush (C) works on carpeting, floor mats, cloth seat trim, or any surface that needs some aggressive agitation. None of these brushes are designed to be used on sensitive trim or on the paint of the vehicle.