Soft, nonabrasive 2 inch bristles. Whether the wheels are aluminum or clear coated, they can be scratched by the wrong brush. The Daytona Speed Master Wheel Brush features nylon Nylex bristles that are both flexible and durable. The end of each bristle is feathered to provide an extra gentle touch on delicate wheel finishes. Use the Daytona Speed Master Wheel Brush on highly polished aluminum, chrome, stainless, clear coated, and painted wheels with confidence.