This kit contains medium stiffness nylon power brushes that will attach to your favorite cordless drillElectric drill is not included.Size: 4 Inch 2 Inch 3.5 Incn Brush have a quarter inch quick change shaft.These nylon bristles will not scratch and can be used on tubs, sinks, baseboards, fiberglass shower enclosures, shower door tracks, and porcelainItem color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Designed for clean bathtub, grout, bathroom surface, floor, tile, shower, toilet and carpet etc.Suitable for cleaning kitchen or bathroom sufaces like shower tile, bathroom bathtub sink, hardwater stains , grout lines, , toilet, floor, and carpet, cover, tire etc3 Pc x Drill BrushNylon bristles will not scratch your bathtub and shower tile surfaces.Well built and durable construction for use both indoors and outdoors,Cordless drill NOT included Drill NOT includedBrand newThis drill brush attachment kit includes 4 brushes with different sizes and shapes to fit into most of the cordless drills, such as , and etc.Please allow 1-2cm errors due to manual measurement.Convenient to use. you time.These attachments perform more powerful on the drill/driver than the manual/spin scrubber, makes your clean up work easier and more efficient; Long last with the 1/4-inch quick change staineless shaft and durable nylon bristlesDurable in use.