This brush is a heavy grit impregnated 33 inch cylindrical brush. The heavy grit along with the cylindrical rotation of the brush makes this a great brush for heavily soiled floors. This brush is designed to fit on Tornado BR 33/30 ride one floor scrubbers which requires 2 brushes to operate, so make sure to order two if you are buying for the first time. If you are looking for a softer brush for everyday scrubbing, please check out our black brush and the even softer white poly brush.