Xuchang Sida Electric Power Equipment Co., Ltd. is a professional production base of domestic anti-theft nut, the company is located in the birthplace of The Three Kingdoms culture, has a long history which gives the power of the company to take off. Since its inception, sida people has been committed to the introduction and development suited to China's electric power industry equipment needs of high-end products. Xuchang sida electric power equipment co., LTD., relying on domestic leading production technology, has a large number of advanced cutting, milling, drilling and other production equipment and perfect detection means, and actively with many domestic authoritative research institutes long-term technological exchanges and cooperation, continue to improving the quality of the product and technology updates, with a number of technical invention and utility model patent. The company mainly produces circular marble type anti-theft nut (QLCN3 type), the torsional sliding type anti-theft nut (QLCY type), fastening nut (QLCF type), type (QLC - NC), and saw the thief anchor device (QLC - liu xiaobo) hardware such as a variety of electric power line running, including circular marble type is the only anti-theft nut by wing on property insurance co., LTD., the quality of products.