... grounding electrode, GEM and so on.eavy Duty Clamps Description: Heavy Duty earth Clamps are made of high quality stainless steel, designed ... of high fastening and resistance to tension of Heavy Duty clamps. Products are handsome in appearance, easy to use, have ... or power tools, the installation is very simple.Heavy Duty Clamps Application: Mainly used in ships, diesel engines, gasoline engines, ...