We supply circular bottom knives for all brands slitting sections and machines. Together with circular top knives they are the center of every slitting section. All circular bottom knives are precision ground to achieve best axial/radial runout and parallelism.Nanjing Metal Industrial CO., Limited was established in 2006, located in Mingjue Industrial Park, Lishui Area,Nanjing. We have more than 15 years of experience in the manufacture and sales of industrial machine blades, machine parts and regrinding services.