Steel bar shear blade's feature: Above 3-5 times ... heat treated for optimum toughness and abrasion resistance to make them highly resistant to damage, impact, vibration, clamping and cutting force. ... 2008, SGSIn order to serve and supply you better cutting tools, we sincerely hope that you could afford such information ... hot-rolled billet,Hot-rollered wood blade≥20HRC215HV metal cutting machine blade