for over 15 years experince , we design and manufacture quality roll forming tooling, material: D2,skd11. D4 Bearing steel SHRFM ... knows the importance of roll forming tooling (roll tooling)for the success of metal forming operation. Optimum design ... (D2,SKD11), Cr12MoV(D4) , Cr12, Gr15(bearing steel) for the roll.We have more than ten years exporting experence, inch size ...