• High quality: high-quality nylon bristles that do not fall out or scratch. • Better performance: ideal for cleaning bathrooms, showers, toilets, kitchens, and more. • Universal fit: compatible with most standard 1/4 inch drills. • Professional set: includes 4 brushes of different sizes and stiffness. • Time-saving: attaches to cordless drills for faster and deeper cleaning. • Specification: 4PCS drill brush kit. • Material: Nylon bristle stiffness. • Sizes: 2", 3.5", 4", 5". • Cleaning of bathtubs, grout, upholstery, bathroom surfaces, floors, tiles, showers, toilets, and carpets. • 1/4 inch quick-change shaft. • Nylon bristles that do not scratch tile surfaces. • Includes: 2" round brush, 3.5" cone brush, 4" round brush, 5" round brush.