The scratch-free bristles provide safe cleaning on all surfaces. The Masterson’s Black Buster Wheel & Rim Detailing Brush is designed to reach deep inside all spokes for a full cleaning of all wheels & rims. The premium brush features a full 360-degree brush head that deep cleans all wheels and rims. Safe for all wheels Including painted, chrome, stainless steel, powder coated, anodized, and polished surfaces. The brush features a flexible core system that supports the bristles and flexes for maximum cleaning of all wheels. The rubber coated tip prevents scratching when cleaning inside wheel barrels and brake components.