Profile: Renqiu Stronghold Carbon Products Co., Ltd specializes in providing engine starter and alternators. We are an ISO 9001 certified company. Brush holders are critical to motors, generators, and other electrical equipment that utilize carbon brushes. Carbon brushes and brush holders work closely to ensure that current is transferred from the stationary to the rotating parts for proper equipment operation. The carbon brushes maintain contact with the rotating parts of the motorized equipment through the brush holder to transfer the current. The brush holder provides the structure to support and position the carbon brushes to ensure they remain in contact with the correct position during the equipment operation.