ITEM NAME:Stainless Steel Quick Release Pin w/ Ring 6.3X40mm for Boat Bimini Hinge Description: Made of Marine Grade 316 Stainless Steel, very tough and resistant to corrosion Widely used in various Shipbuilding, ship outfitting. Every production.2 Pieces Boat Hinge Pin. Quick release pin for easy installation. Made of Marine Grade 316 Stainless Steel, very tough and resistant to corrosion. Material:316 Stainless Steel.