Easy to Use: Labeled positive and negative, easy to identify. 1 Allen key provided for easy installation. Quick disconnect. After inserting the battery, connect the battery poles by pressing the lever down, no tools required. Comfortable and Firm: The battery terminal has 4-way connectors designed for multiple connections. The wiring is easy to change. Convenient wiring and firm connection. High quality: The battery terminals are made of tinned copper, corrosion-resistant, with good electrical conductivity Wide application: Suitable for car batteries with SAE/JIS type A round posts. The positive and negative battery terminals can be used for cars, vans, caravans, motorhomes, truck batteries, car audio, etc. 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.