SOSS® Invisible Hinge model #212 is for use in wood or metal applications that are 1-1/8″ to 1-3/8″ thick. The model #212 is made of zinc and steel materials. Nylon links provide strength and durability. This mid-range door hinge will provide superior appearance and durability. Our Hinges are found in many applications where flush fit, compact size and smooth operation are necessary features. SOSS® Invisible Hinges open a full 180° and are a single action hinge.