1Widely Applicable: Battery terminal connectors suitable for cars, boats, RVs, trailers, etc. Please be sure to connect correct terminal to correct polarity. 2Stable Connection: The connectors guarantee safe and reliable electrical connections, effectively resist oxidation phenomena, thus improving performance and longevity. 3Wiring Size: Suitable for wires with a diameter of 5.2?7.4mm/0.2?0.3in (Awg specification 1?4) or 16?35mm/0.62?1.37in ^2. 4Practical and Reliable: Multiple power leads, power switches or other current loads can be attached to help users respond flexibly to multiple needs. 5Durable Construction: The connectors are made of metal materials, which are resistant to high temperature, wear and cold, and are suitable for various harsh environments.