This brush is meant for rigorous scrubbing of durable carpets. The bristles are stiff 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. Safety Tips: Always wear face and body protection. Be sure that the brush’s steel insert shaft is firmly fastened in the drill chuck. Always use a properly grounded machine. Maximum RPM 3,500.