【Durable and Sturdy】The battery terminals are made of high quality brass, strong and durable, have high conductivity and corrosion resistance, can be used for a long time. The plus and minus battery terminals have excellent electrical conductivity, reduce voltage distortion and transmission loss. 【Easy to Install】These 4-way hex key battery clamps fit the round post car battery and can be connected to the battery terminal by pressing the lever down. It is easy for you to use the wrench Allen key to install the connectors. 【4-Way Terminals】Our battery connector socket is designed for multiple wire connections. It has 4 posts for different wires. After inserting the battery, it is connected to the poles using a sliding bracket, so no tools are required. 【Safety Protection】Positive (red) 17.5-19.1mm, negative (black) 15.9-17.5mm. The car battery quick connector is easy to recognize and avoids the risk of electric shock. Stainless steel screws, good resistance to oxidation, better