... 3.reduce friction Increased using life mould parts with high quality core holder 1.core holder material:s45c+brass2.has ... a specialized manufacturer of mold components in DIN, AISI, JIS Standard in China. Established in 2002, Datong Precision had been certified ... Spain, Italy, New Zealand, Australia, America, Canada, Turkey, Singapore, Malaysia , India, South Korea, etc. Our Brands: Since 2002, we had ...