Stainless Steel Hinge: Made of high quality marine grade stainless steel. You can install it on the door or anywhere for connection. These feature corrosion resistance and durability in the saltwater environment. High Quality Door Hinges: These marine hinges fit your boat perfectly and fold back 270 degrees so your hatch can lay flat in the open position. The surface is mirror polished and brushed nickel finished, which is not only durable but also has an exquisite appearance. They are ideal for apartments and fishing boats. Heavy Duty Boat Hinge: Made of corrosion resistant 316 stainless steel. These marine door hinges are made of high quality stainless steel to ensure daily use. These marine hinges make removal easy. They become reliable boat hinges to meet your needs. You can easily install them anywhere on your lens. Heavy Duty Butt Hinges: These shiny mirror polished hinges are built to last and withstand the elements. Plain bearing action makes these door hinges open and close