rotary shear knives BLADE MATERIALSGBDINJISASTMISO9CrSi90CrSi5———6CrW2Si60WCrV7——60WCrV27Cr7Mo2V2Si————Cr12MoVX165CrMoV12———Cr12Mo1V1X155CrVMo12-1SKD11D2160CrMoV12W18Cr4VS18-0-1SKH2T1HS18-0-1W6Mo5Cr4V2S6-5-2SKH9M2HS6-5-24Cr5MoSiV1X40CrMOV5-1SKD61H1340CrMoV5LingFeng company has been approved by ISO9001 Quality Management System Certification, High-Tech Enterprise Certification, High-Tech Product Certification and the certification of Brandname Products in Anhui Province. We also have three knife production and material patents.If you are interested in our products we just need you to let us know the size of the products that youneed and we would be very glad to submit you our best offer. Thanks