Features: Premium chrome plate copper construction ensures 99%+conductivity and corrosion resistance compared to steel alternatives, delivering stable current (300A/500A/800A)for industrial welding operations. Easy installation with ergonomic grip reduces hand fatigue during extended welding operations, outperforming traditional bulky clamps. Ideal for professional welders and industrial maintenance men requiring reliable electrical grounding connection across metal fabrication and equipment repairs. Performs exceptionally in shipyards, automotive workshops, and high altitudes construction sites with 300A/500A/800A capacity for arcs welding and heavy machinery grounding. Engineered for extreme environment, this heavy duty ground clamps maintains secure connection through vibration, moisture, and temperature fluctuations while preventing oxidation buildup. Specifications: Component: Copper Option Type:300A,800A,500A; 300A Ground clamps Size:Approx.70x140mm/2.75x5.51inch 800A Ground clamps Size:Approx.91x188mm/3.58x7.4inch 500A Ground clamps Size:Approx.90x180mm/3.54x7.08inch Note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color. Package includes: 1pc Ground clamps