Hillman Metric Carbon Brushes conduct current between stationary wires and moving parts, most commonly in a rotating shaft. Commonly used in electric motors, alternators, and electric generators. Use as replacement parts for both Hitachi and Ryobi brand power tools. Made of high-quality graphite and copper materials. The material offers strong resistance to rust and corrosion. Dimensions: 16mm x 6.5mm x 17mm.