1.chopper,material is rail steel 2.heat treatment 3.HRC is above 30 1.cut-slasher,material is rail steel2.heat treatment3.HRC is above 304.many kinds of blades5.package:24pcs/carton Factory Item No.Blade SizeGrip LengthMaterialPackageZYCM0210.5"90cm Steel Carbon12pcs/carton forging chopper ZYCM02