... highly resistant to damage, impact, vibration, clamping and cutting force. Files shear knives's life are above ... 2008, SGSIn order to serve and supply you better cutting tools, we sincerely hope that you could afford ... press 3) Base body material: 9CrSi, steel, or others. Or we can recommend material according the working environment.4 ... ,Hot-rollered wood blade≥20HRC215HV metal cutting machine blade