... ,PA,PVC,HDPE,BOPP,metal or stretch film and others.Blades are designed for slitting procees in film ... a variety of high-hardness ferrous metal grooving and cutting process,including tool steel,die steel,bearing ... steel,refractory steel,stainless steel,cast iron and other ferrous materials, which are difficult to process ... 9,SKH-2,SKD11,H13K,H13,Cr12MoV,9CrSi and so on.Our factory is using the full ...