Weiler 3/4" Round Power Tube Brush is Ideal for cleaning and deburring smooth or threaded blind holes on steel, armored steel, cast iron, ductile iron and tool steel parts. 7/32" stem diameter for use on CNC/milling/automatic machine, drill, drill press, corded/cordless hand drill or cordless screwdriver. Features a single continuous length of stainless steel stem wire filled with a single spiral of crimped wire for a more flexible brushing action.