Brush batch: The brush batch motor has a carbon brush, so it needs to be replaced in time after the carbon brush is worn to avoid damage to the batch. In the face of some demanding workshops, the brush batch is not adopted because of its high noise.Brushless batch: Brushless batch does not need to replace the carbon brush, so there is no need to worry about the wear of carbon brush. The brushless motor used is small and light, so even if it is used for a long time, it will not make people feel tired. And there is no brush batch, so it has little heat and low noise, so it is widely loved by manufacturers.