Green Medium Bristles-Standard Carpet Brush: This brush is meant for rigorous scrubbing of durable carpets. The bristles are durable enough to dislodge old stains and they will hold up better than the Soft Carpet Brush on heavy duty carpet. You can also use this brush on tile, grout, and floor pads. general scrubbing and cleaning, all carpets, door panels rv's home etc. i.e., boat decks, hulls and wood-work, house siding, decks, porches, wood window casings and frames, tiles and grout in bathrooms and showers and floors, etc. Features a quarter inch quick change shaft that allows this brush to fit in all cordless drills and impact drivers.