Wheel Woolie Brosse Large 18Wheel Woolies 18" Large brush with red grip handle The benefit of the Wheel Woolies comes from its metal free design which reduces scratches and brush splatter. Twisted wire spoke brushes are known to damage rims and create residue splatter due to their tough bristles. The soft, dense carpet fibers of the Wheel Woolies are 100% polypropylene, recyclable and chemical resistant. These fibers are great for holding in suds to transfer them to the wheel.