This hinge is designed with a stop that keeps the hatch upright when open. It also makes it easy to take the hatch off by simply removing the cotter pin. Made of 316 stainless steel for use in any marine environment. Measures 2.5" x 3". Use #10 fasteners. Durable 316 stainless steel 2.5"" x 3"" Use #10 fasteners | Whitecap Stainless Steel Hatch Hinge, each