Weiler 5/8" Double Stem, Double Spiral Power Tube Brush is Ideal for aggressive cleaning and deburring on 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 four stem wires and a double spiral of straight wire fill material. Four stem wires and a double spiral of straight wire fill material. Provides an aggressive cleaning and deburring action. . . .