Ningbo changshi electric power tools CO., LTD. it’s predecessor Xiangshan changshi plastic CO., LTD. was originally founded in 1995. Based in Ningbo, 200km from Shanghai. Ever since our inception, we have grown up to become a leading manufacturer and supplier of electric power tools such as stringing pulley block series and many more. We are specialized in the manufacturing of advanced MC Nylon pulley accessories. Our industrial components products are known for its high durability, corrosion resistance, and precision. These are widely used in the Electrical and installation industries.