... anchor. 2.According to ISO 9001 2001 Stainless Steel Folding Anchor,steel wedge anchor1. Casting: investment casting ,precision casting, lost wax casting ... process complex shell process.2. Materials: stainless steel ,carbon steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN ... .7. Quality control: According to ISO 9001 2001 Stainless Steel Folding Anchor