Our drill brush which can be attached to cordless drills with its 1/4'' mounting shaft can exert a deep cleaning to remove stubborn stains and make the time-consuming cleaning work finished quickly. It comes with 3 types of brushes-2'' small brush, 3.5'' medium brush and 4'' large brush to scrub large surfaces, small surfaces, corners, hard-to-reach spots and crevices areas in bathroom and kitchen like tiles, tubs, sinks, toilets, baseboards, fiberglass shower enclosures, shower door tracks, countertops, and other suitable metal/glass/porcelain/plastic surfaces.