-Soft Scrub Brush, Medium Scrub Brush, Stiff Scrub Brushes -3 piece drill powered scrubbing kit -Durable rotating Nylon bristled cleaning brushes -5 inch diameter, steel hex shaft fits most cordless drills Three brush drill powered cleaning brush kit. Included are one each of soft, medium, and stiff bristle brushes. Wide range of applications include: Tile and Grout, Bathroom cleaning, Upholstery and leather cleaning. The stiff red brush is suited for heavy duty cleaning of brick, concrete and stone patios, sidewalks, and driveways.