ITEM NAME:Stainless Boat Hinge Marine Kayak Spring Accessories- Quick Release Pin, Description: Material: Marine Grade 316 Stainless Steel Quick release pin for easy installation Strong and durable, long lifespan Widely used in various shipbuilding, ship outfitting Every production.1 Piece Boat Hinge Pin. Material: Marine Grade 316 Stainless Steel. Quick release pin for easy installation. Strong and durable, long lifespan.