This is a great brush for agitating dirt and brake dust on wheels. The gblack and white (salt and pepper) bristles are flagged on teh ends and won't scratch, and are soft enough to get into crevices. When used with AF901 Wheel Cleaner, the brush quickly loosens most dirt and brake dust with little effort, so it can be flushed off with water. 8" plastic block with short handle, 2" trim.