3/16" Quick Link Stainless Steel 316 Marine Grade-20 Pieces Stainless Steel 316 Marine Grade-20 pieces. Quick Links are always slightly undersized.Most people order 1 size larger if it is used for Chain This item cannot be returned due to safety risks associated with used materials. SIZE: A=3/16", D(opening)=1/4", B= 1-1/2", C=1/2", WT=0.05LB. 3/16" size, with 1/4" opening. WLL=950 LBS