Ultra Stiff Nylon Bristle Industrial Grade Scrub Brush for Metal and Stone Large 5 inch diameter Ultra Stiff drill powered brush for stone, brick, metal, and concrete For professionals, contractors for heavy duty cleaning, scrubbing, and de-scaling. Bristles are permanently set in the blocks and will not fly or pull out like a wire brush. Aggressively remove loose paint, rust and stubborn stains on concrete, stone, metal, and brick Made in the USA. Part Number: 5 Inch Ultra Black 7/8,All Drillbrush Products have a 90 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.