Zhejiang Holley International Co., Ltd., a subsidiary of Holley Holding Ltd. (Holley Group), specializes in the fields of design, manufacture and sale of LV to HV electric products and equipment like metering and system, circuit breaker, surge protective device, AC contactor, transformer, insulator, lightning arrester, dropout fuse cutout, transmission line fitting/hardware, generator, medical and health care products, chemical products, etc.