This Flush Door Hinge features a knuckle that sits below the mounting surface, creating a smooth, flat design perfect for deck surfaces or where lines might snag. In door applications, they fit flush with the frame and are completely invisible in the closed position giving cabinet fronts a sleek, clean look. 100° degrees of motion. Ideal for recessed deck hatches or lids. Constructed of corrosion resistant stamped 304 stainless steel. Installs with four #10 FH fasteners (not included).