It has a Electro-Hydraulic system that works with electricity. Its motor force is inceased related to diving force into the bulk material. It is used by a control panel. The mechanical structure for opening & closing is succinct and inventive. The standard range of grabs are available in volumes from 325 to 12.000 litres. These electro hydraulic clamshell grabs are fitted with 5, 6 or 7 jaws, depending upon grab volume and the materials to be handled