4 in. Double Acting Spring Hinge in Galvan Neal (Set of 2)The Trans Atlantic 4 in. double acting spring hinge is made to strict specifications for exceptional quality. These hinges are recommended for use when automatic self closing of a door is required. Double acting spring hinges are also used for doors that need to open in both directions and return automatically to center such as cafe doors. ANSI A81071F certified for self closing doors Commercial standard weight hinge Packed with wood and machine