Usage Tips:Material: The car battery connectors are made of pure copper, corrosion-resistant, good electrical conductivity, not easy to rust, and durable. Convenient to remove: Fix the car battery clip by closing the cover. When replacing the battery, just lift the insulating casing, replace the battery, and then reattach the clamp. Safe casing design: The quick release terminals are equipped with a shell, which can protect the metal in all directions. It not only has dustproof, moisture-proof and protective functions, but can be directly connected to the battery. Wide application: The quick release battery terminal clamps have a wide range of uses, such as connecting cars, trucks, caravans and RV batteries. The quick disconnect terminal can be directly connected to the battery to supply power to the device and is safe for your use. Note: The data are all measured manually, please allow 1-3cm error, due to differences in light and display, there may be some color differences, please refer to the actual item received.