The Dyson Stiff bristle brush attaches to the hose or wand on your Dyson vacuum cleaner for dislodging ground-in, stubborn dirt and dried mud from upholstery and carpets. The nylon bristles are angled to create a flicking action as they work through carpet pile popping the dirt up into the airflow. Gaps between the bristles make the brush easier to push and prevent it from sticking to surfaces. The Stiff bristle brush is made of tough polypropylene for strength and durability, and is not recommended for use on delicate flooring, rugs or carpets. Consult your manufacturers recommended instructions before vacuuming and caring for your flooring, rugs and carpets.