Two piece kit includes two 5 inch Yellow medium scrub brushes Yellow Brush: -This 5 inch diameter brush is produced to professional standards -Bristle length is one inch and the bristles have a medium stiffness -Steel shaft has been engineered to resist spinning out of the block -Yellow Drillstuff Brushes are also sold separately -Look for our complete line of Drillstuff brand brushes The user controlled power rotation of your cordless drill, combined with this professional quality medium stiffness bristle brush lifts and easily extracts spots from bathroom surfaces, upholstery or carpet. This brush is manufactured exclusively for Drillstuff. The yellow medium bristle brush is meant for rigorous scrubbing of carpets, tub and tile, and flooring. 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 tiles, grout, and floor pads. It is used for general scrubbing and cleaning of carpets, door panels, RV's, and countless applications in the home. Recommended technique to use this power brush is to angle the brush to the surface to be cleaned (never use flat on a surface) and increase or decrease the angle as you clean.