... Marine hardware 1.We offer anchor chain connector anchor swivel ,double swivel ,swivel anchor, joint ,anchor swivel,double swivel anchor chains .2.Material:SS316 ... steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN, ASTM, BS,JCSI.3. ... Piece numbers: small, medium and large series.4. Process: cast, machining, turning, milling, drilling, ...