Weiler 3/8 in round power tube brush is ideal for cleaning and deburring smooth or threaded blind holes on aluminum, brass, bronze, cast iron, copper, high nickel alloys, steel, stainless steel, ceramic and soft tile parts. 1/8 in Dia stem for use on corded/cordless hand drill, drill press, drilling machine, CNC/milling/automatic machine. 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.