A control system for a tool coupling of the type that attaches a tool to an excavator dipper stick and provides for rotation of the tool with respect to the dipper stick about an axis, and further provides for tilting of the tool, includes a rotation sensor and a tilt sensor. The impregnated andor coated ceramic foam particulate material is mixed with a ceramic binding material with or without an organic binder in an aqueous composition solution to form a castable and pressable mixture. The base station controls the data transfer rate to perform communication at the data transfer rate designated by the mobile communication terminal apparatus. A cover member is welded to the yoke bracket. The second restoring element is connected to the stopping element and the fixing base and drives the stopping element to stop the latching element.