The AMMO Two-Tier Scrub Brush features two tiers of boar hair bristles for efficient wheel cleaning. Featuring a waterproof molded handle, the two-tier brush is specially designed for cleaning rims, tires, wheel wells, brake calipers, rotors, suspension components, and engine bays. The blackboar hair blend offers superior wicking ability to deliver Plum Wheel Cleaner or Brute Wheel Soap for better agitation. Features two tiers (lengths) of black boar hair for effective cleaning of spokes and wheel faces. The AMMO Two-Tier Wheel Brush is Made in the USA to the highest quality standards and is the quintessential wheel cleaning tool.