This kits brushes have super stiff and aggressive nylon bristles for the removal of stains on concrete, brick or stone. The large diameter brush is especially useful for larger de-scaling projects on metal surfaces or removal of loose paint. This brush has very stiff bristles and is NOT recommended for fabric, carpet, or where scratching could be an issue. Cordless drill NOT included. Common applications include cleaning BBQ grills, smoker grates, or oven racks of baked-on food and heavy grease deposits. Use outside for restoration of brick and mortar by removing rust, hard water or mineral stains. These brushes can also be used for industrial applications such as heavy duty stripping of loose paint and other harsh scrubbing applications. All Drillbrush Products have a 180 day no questions asked Money back Guarantee. If you are not completely satisfied with our product we will issue a full refund or ship out a replacement at the buyer's request. Cordless Drill NOT included.