ITEM NAME:1pcs 6.3mm Stainless Steel Quick Release Pin ring for Boat Top Deck Hinge J!j Describe: 100% New and High Quality. Made of Marine Grade 316 Stainless Steel, very tough and resistant to corrosion Widely used in various Shipbuilding, ship outfitting. Every production.1PC Release Pin with ring. Made of Marine Grade 316 Stainless Steel, very tough and resistant to corrosion. 100% New and High Quality.