Cold Work Tool Steel Cr12,D3, SKD1 ,1.2080 1.More than 20 years of production experiences 2.Black or machined surface Cold Work Tool Steel Cr12,D3, SKD1 ,1.2080Characteristics ... widely used in making cold die and punch, cold shearing ,drilling bushing ,gauge, wortle, coining die,thread rolling die, screw thread rolling die and so on ...