The name Multi Grapple is quite a good description for them. The basic structure is quite simple and similar for all brands: a rigid main body with two moving jaws mounted on both ends of the frame. The jaws are powered by one or two hydraulic cylinders, and they are connected together with a steel bar so that they move simultaneously. For heavy applications these hydraulic grapples are always equipped with a powerful hydraulic rotator but for light loading and sorting jobs a tilt rotator can replace it.
