marine anchor chain consists of stud and studless. grade: AM2,AM3 diameter: 22mm-157mm class certificate: ABS,CCS,LRS,NK,etc. marine anchor chain consists of stud and studless.grade: AM2,AM3diameter: 22mm-157mmclass certificate: ABS,CCS,LRS,NK,etc. testing load of stud link anchor chainChain DiameterChain DiameterGrade 2Grade 3Approx.mass27.5mmminchesProof load(kn)Breaking load(kn)Proof load(kn) ...