Hanwu is specilized in researching cotton saws since 2005, and makes the greatest efforts to control the saws's quality from the raw material to finished products in the industry chain. The production use hot coil cutting tool steel, which have cold rolled steel strip, coutinuous quench and temper line, saw punching, flattening, tooth punching, reshaping, polishing, marking, packing and etc. Each link is checked strictly.