DNB deck hinges are made of marine-grade 316 stainless steel with highly polished surfaces for great durability, strong corrosion resistance and longer service life in saltwater circumstance. Size: W*L*H: 0.71"(18mm) * 2.36"(60mm) * 1.4"(35mm); the distance between two mounting holes' center: 1.5"(39mm). Each deck hinge comes with 4 stainless steel mounting screws (2 pcs extra for spare parts), easy to install. Ideal for kayak, canoe rigging, marine boat, bimini, fishing dinghy, etc.