Joint type is a term used to describe the way two pieces of material are connected. HINGE is a five letter joint type that is used to connect two pieces of material in a way that allows them to swing open and closed. Miter is another five letter joint type that is used to join two pieces of material at an angle. Ball and socket is a thirteen letter joint type that is used to connect two pieces of material in a way that allows them to move in multiple directions.