Concealed hinges are hinges that are completely concealed or hidden when the door is closed: You don't see any of hinge parts from neither the outside nor inside of the door. It is known as a type of invisible hinge because the hinge itself become invisible when the door is closed unlike ordinary door hinges. This type of hinge allows the door to close flush with the frame for clean appearance. Sugatsune concealed hinges are known for their appearance, function, and adjustability; for instance, our 3 way adjustable concealed hinge series make it easy for cabinet builders to easily adjust the door after installation. Find out what makes the best concealed hinge series stand out.