SOSS® Invisible Hinge model #220 is for use in wood or metal applications that are 2″ thick or thicker. The model #220 is made of zinc and steel materials. Nylon links provide added strength and durability. This full size door style 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.