Drillbrush Is A Nylon Brush Attachment That Fits Into Your Cordless Drill or Impact DriverMulti-Purpose Cleaning Tool That Allows You To Use The Rotation Of A Drill To Easily Scrub Surfaces.4 Inch and 5 Inch Brushes Are Good For Flat Surfaces2 Inch Brushes Are Good For Spot Cleaning And Small Areas.Good For Corners And Contoured Surfaces.