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