General description Drill Brush Attachment Scrubber Cleaning Kit includes 4 medium rigidity drill brushes designed for effective cleaning of various surfaces such as cars, showers, tiles, wheels, upholstery, and more. These brushes feature 1/4 inch quick change shafts for easy attachment to your cordless drill (not included). Technical specifications Brush sizes: 2 inch, 3.5 inch, 4 inch, and 5 inch Bristles diameter: 0.3 mm Brush rigidity: Medium Usage These nylon bristle brushes are safe for use on a variety of surfaces, including: Tubs Sinks Baseboards Fiberglass shower stalls Shower door tracks Pool tiles Porcelain Other information Package includes: 1 * 2 inch drill brush, 1 * 3.5 inch drill brush, 1 * 4 inch drill brush, 1 * 5 inch drill brush