This 20 inch poly brush fits directly onto our Viper Fang 20" battery scrubber. The poly bristles are economical brush that will scrub some of the toughest floors. It is great for scrubbing any type of hard floor, including; terrazzo, concrete, vinyl tile, and any type of stone. Our auto scrubber brushes are great for cleaning the high and low parts of any uneven floor. Where as, our floor scrubbing pads are only good at cleaning smooth surfaces. Take a look at our floor scrubbing procedures for more hints and tips on how to properly scrub your floor.