Sea-Dog Stainless Steel Anchor SwivelsSea Dog investment cast AISI 316 stainless steel swivel anchor connectors are designed to easily slide of anchor rollers, preventing snagging which minimizes wear on the bow roller and windlass. These precision, high-quality swivels feature double locking pins for extra security. Can be used between anchor and chain or between chain and line. Investment cast 316 stainless steelDimensions:182608-1 A: 3-9/16"; B: 5/8"; C: 13/16"; Allen Wrench Size: 5/32" & 4mm; Chain Sizes: 1/4" - 5/16"; Break Strength: 5,500 lbs.; 182612-1 A: 4-11/16"; B: 13/16"; C: 1-1/16"; Allen Wrench Size: 5/32" & 4mm; Chain Sizes: 5/16" - 1/2"; Break Strength: 17,000 lbs.;