It is generally made of pure carbon plus coagulant, appearance generally was square , stuck in the metal stent, which has a spring pressed it on the shaft. Replacing brushes can fix an intermittent motor. Carbon Brushes with wire leads and brush springs attached. Worn brushes are often the cause of a poorly running motor. Carbon motor brushes are one of the most commonly replaced power tool components. Carbon brush is motor or generator, or other rotating machinery fixing part, and the rotating part of pass or signals device. Carbon brush is the transfer of or signals between the fixed portion and the rotating part of the motor or generator or other rotating machinery equipment. New brushes can restore a motor's electric ., Manufacturer: Akfldms