Slitting knife is mainly used for metal production and processing of line, the blade of raw materials made of precision machining with high-speed cutting tool steel SKD, the SLD, SKH. Particularly suitable for high-speed slitting of a variety of cold rolled steel pickling plates, silicon steel plate, stainless steel, silicon steel sheet, strip, etc. Cut points is the most important part of the production process, and therefore the accuracy of slitting knife demanding, precision grinding machine to handle the plane of the blade, forging, machining, heat treatment, and then finely ground in a special and strict control to ensure that all finished parallelism within 0.003mm.