Amarine-made AISI 316 Stainless Steel Marine Boat Anchor Swivel Connector for 1/4" , 5/16" Chain AISI 316 Stainless Steel Marine Boat Anchor Swivel Mirror Polished Working Load: 5000 Lbs Pin For Chain: 1/4" Pin For Anchor: 5/16" Overall Length: 3-1/2"