Great for wet and dry use, this multi-function brush aims to remove the dust, bread crumbs and other small items out of wheels, air vents, trim, seat crevices and emblems, make car fully tidy and clean from the inside out. Scratch Free Detailing Brushes: These auto detailing brushes contain no metal and are designed to clean without scratching. Premium Boar Hair: Boar hair cleans without scratching and many detail professionals prefer boar hair bristle brushes