4 inch diameter drill powered scrubbing brush features nylon bristles, rugged construction, and a quarter inch quick change shaft. This brush fits securely in battery powered drills. Red stiff bristles are designed for heavy duty scrubbing and tough stains on garage floors, brick and concrete. See our 2 and 5 inch red stiff drillbrushes in our store.Cordless drill NOT included Drill NOT included. -Clean, Scrub and Restore garden statuary, bird baths, headstones and monuments. Works great on concrete, brick, fireplace, stone, sidewalks and driveways. -Need to clean or scrub large outdoor surface areas? The Red Stiff 4-inch flat brush is well suited to concrete pools and ponds, stone walks, decks, driveways, and larger tile surfaces. -This brush utilizes a rugged steel shaft that won’t spin out and has a quarter-inch quick-change connection for rapid changing of components. This shaft makes our brushes compatible with both cordless drills AND drivers. -4 inch diameter Red Stiff power scrub brush,Cordless drill NOT included -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.