Grade U2 Grade U3 Stud LinkAnchorChainCable Open link chain,marine link chain, common link 6dx3.6d chain workshop Swivel group: 1) construction one: E+EL+SW+EL+C, (end link+enlarge link+swivel+enlarge link+commen link) this type is normal 2) construction two: E+EL+SW+EL+E, (end link+enlarge link+swivel+enlarge link+end link) this type is used in stud link chain with enlarge link each end of each chain
