Carbon brush is made from high-quality materials that ensure durability and reliable performance; designed to withstand the demands of the jig saw's operation and provide long-lasting functionality., Promax Carbon Brush is specifically designed for use with the Model PXJS210 Jig Saw 520W. It is engineered to fit perfectly and function seamlessly with your jig saw, ensuring optimal performance., Regularly replacing carbon brushes is essential to prolonging the overall lifespan of your jig saw. The Promax Carbon Brush helps to maintain the proper electrical connection.