Weiler 1/2 in 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. 3/16 in Dia stem 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. This product is vending machine ready.