1.Passed the ISO9001:2000/Long working life 2.Reasonable price 3.We ... the ISO9001:2000 2. Materials:5CrW2Si,6CrW2Si,Cr12MoV,9SiCr,GCr15,H13,H13K,HMB and HMK 3.Features:High intensity,high hardness,high toughness,and high ... of steel,rubber,papermaking,etc7.Technology:Each technical index reaches the international standard The Big Bar Shearing Blades