The Koch-Chemie Drill Brush Set comes with three brushes in 5", 4", and 2" sizes to tackle every cleaning job. The shank fits any standard power drill with an adjustable chuck, making it easy to power through dirt and grime. Use the larger brushes for big surfaces and the smaller ones for tight spots, corners, and crevices. The red hard brushes are perfect for tires and rubber floor mats, giving tough areas a deep, thorough clean.