The VIKING Wheel Barrel Brushes have been specially designed to clean those hard-to-reach areas in and around the wheel, including tight spaces and deep inside the wheel barrel. The cleaning heads are packed with dense fibers that gently and safely loosen dirt, brake dust, and grime. The durable fibers compress between the rim and brake disc for a complete clean, giving you professional results at home. Includes 2 brushes Safe for all wheel finishes Polypropylene fibers are chemical resistant Extra-long cleaning heads for increased reach 2 sizes for a complete clean:  1.1in. diameter and 2.4 in. diameter