Role of carbon brushes: Motor carbon brushes have good commutation and current collection performance, used for replacement and daily maintenance. Because carbon brush wear is a common cause of intermittent decline in motor functions, reduced electric brakes, and reduced motor power Sturdy and durable: The replacement carbon brush is made of high-quality durable graphite metal, with high hardness, not easy to wear and corrosion, low spark, low noise, and long service life. Carbon brush is one of the most commonly used power tool parts Replacement of carbon brushes: After replacement, the motor has a better maintenance effect and avoids interruptions caused by poor contact of each carbon brush. It can solve the problem that the motor stops regularly and restores the electric brake of the motor Wide range of uses: The motor carbon brush is widely used for electric circular saws, miter saws, electric drills, electric hammer drills, dust collectors, motorcycles, weed eaters, blower motors, cutting saws and angle grinders, as well as other types of suitable size power tools and electric motors. Package includes: The package contains 20 carbon brushes, size 5.3*5.3mm, enough quantity to help you replace them in time. Carbon brushes play an extremely important role in the electric mill, without them the motor will not operate normally "> Good quality product