Four Wire Outputs: These battery terminals have 4 different sizes of wiring output for 2/4/8/10 gauge inputs, easy to modify the wiring. It contains 2 automotive battery terminal covers, waterproof and dustproof, to protect the socket. Positive Negative Terminal: Positive battery terminal connector (19m) + Negative battery terminal connector (17mm). Secure Connection: The cables are held by a screw and establish a strong and secure connection. Installation is easy and only requires a set of wrenches (NOTE: Please do not overtighten the terminal bolts, otherwise it will cause breakage). Sturdy and Durable: Zinc alloy construction prevents the battery from corroding and extends the battery life. They have excellent electrical conductivity and high corrosion resistance. Universal Fit: The positive negative battery terminal clamp is suitable for most models and car battery, easy to replace and install.