Applicability: The battery clamps are compatible with positive and negative standard batteries of cars, boats, vans, and other vehicles. Premium Material: The M8 battery pole adapter is crafted from high-quality brass, ensuring excellent conductivity, rust resistance, and robustness, making it suitable for long-term use. Easy to Identify: The battery pole adapter features a large connector and a small connector. The larger connector is designed for the positive pole of the battery, while the smaller one is for the negative pole. Reliable Connection: The design of this battery clip guarantees a firm connection and delivers a stable current output, ensuring that your vehicle remains efficient and dependable. Remark: Manual measurement, slight size erro.