This 20" nylon brush is used to scrub any type of hard floor, including VCT, concrete, stone, terrazzo and ceramic tile, and is compatible with our 20" IPC Eagle walk behind automatic scrubbers and the Performer 20" floor scrubbing machine. The nylon bristles are more flexible than the rest of our auto scrubber brushes, and will last the longest. The bristles are secured to a plastic block that automatically screws on and off of the head of the scrubber without the need for you to get down on your hands and knees to replace the brush. This brush can be used on any type of smooth or uneven floor. It works best on any uneven floor, like stone or tile, to clean within the cracks and low spots, as well as the high spots. Unlike our floor scrubbing pads, which just glide over the floor, the nylon brush will conform to your floor and clean everything. This definitely our most popular floor scrubbing brush, and it will last the longest. Take a look at our floor scrubbing instructions, for a guide on how to scrub your floor with an auto scrubber.