Weiler 1/2 in double stem, double spiral power tube brush is ideal for aggressive cleaning and deburring on steel, armored steel, cast iron, ductile iron and tool steel parts. 5/32 in Dia stem for use on CNC/milling/automatic machine, drill, drill press, corded/cordless hand drill or cordless screwdriver. Features four stem wires and a double spiral of straight wire fill material. This product is vending machine ready.