【Durable and Sturdy】The battery terminals are made of high-quality brass, which is sturdy and durable, has high conductivity and corrosion resistance, and can be used for a long time. The positive and negative battery terminals have excellent conductivity and reduce voltage distortion and transmission loss. 【Easy to Install】These 4-way Allen key battery terminals fit round car batteries and can be connected to the battery terminals by pressing the lever. You can easily install the connector with an Allen key. 【4-Way Terminals】Our battery terminals are designed for multi-wire connections. They have 4 positions for different cables. Once the battery is inserted, it is secured to the electrodes with a sliding bracket, so no tools are required. [Safety Protection] Positive electrode (red) 17.5-19.1 mm, negative electrode (black) 15.9-17.5 mm. Quick connectors for car batteries are easy to identify and prevent the risk of electric shock. The stainless steel screw has good oxidation