An assembly is set of manufactured parts or components that work together in unison as one mechanism or device. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation all other translations or rotations being prevented, and thus a hinge has one degree of freedom. Hinges may be made of flexible material or of moving components. In biology, many joints function as hinges like the elbow joint. Torsion generally refers to the angular displacement amount of twisting a shaft, rod, or bar experiences as one end is forced, and the other end resists turning. For example, a motor turning an an axle that powers something else a fan, pump, or beater. Torsion springs are helical springs that exert a torque or rotary force. The ends of a torsion spring are attached to other components, and when those components rotate around the center of the spring, the spring tries to push them back to their original position. Features. Hinge Torsion Bar Assembly. Made with high quality materialSpecifications. Length 5.3. Width 22.25. Height 3.75