High-quality materials: 12v battery terminal made of high-quality brass, strong and durable, have good corrosion resistance and rust resistance, can be used for a long time, the positive and negative battery terminals have a excellent electrical conductivity, reduce voltage distortion and transmission loss. The included anti-corrosion pad can effectively protect the battery. Allen wrenches help you install faster. Standard size: positive (red) 17-18.2mm, negative (black) 16-17 .2mm. The easy to spot and avoid the risk of electric shock. Red is positive and black is negative. Easy to use: The handle is made of high-quality aluminum alloy, comfortable to hold and insulated for safety. The handle unscrews easily and quickly. After unscrewing the handle, simply clip the terminals of the battery terminal to the position of the battery. After connecting the battery, tighten the handle to complete the installation without any other tools. 4-way design: Car battery terminal have 4 terminals designed for multiple connections. The wiring is convenient, the connection is firm, and it is not easy to be damaged. Wide application: 12v battery connector are suitable for car batteries with SAE/JIS type A cylindrical pillars. Battery terminals can be used in cars, vans, boats, campers, trucks, caravans, vans, etc. are for 12V, 24V, 60V car batteries.