Professional Drill Brush Attachment Kit -- This drill scrub brush set contains 4 nylon brushes that vary in size & stiffness to make sure you have the best tool for cleaning job, and not scratch any surface (Cordless Drill NOT included) Smarter Cleaning -- All 4 drill brushes feature a quarter inch quick change shafts that allow you to attach them into cordless drills or impact drivers in seconds, and clean smarter, easier and faster. Quality Material -- Our drill brush power scrubber are made of high quality nylon bristles, clutching to the power scrubber stoutly, and you can worry free about the brush bristles fallen off or causing any scratches. Widely Application -- The durable drill power scrubber brush are widely used for indoor and outdoor cleaning, such as: bathroom, pool tile, flooring, brick, ceramic, marble, grout, car interior & exterior cleaning, car wheels, grease stains on the garage floor, outside the house wall, fence, handrail etc.