Dealing with corroded or loose battery terminals? This pair of aluminum alloy connectors is an affordable, durable fix! Includes one positive (+) and one negative (-) terminal clamp, each clearly marked. They're made from lightweight but sturdy aluminum alloy, which resists corrosion better than some cheaper metals. The positive terminal has a 1.7cm hole, the negative a 1.6cm hole, designed to fit standard battery posts on most cars, trucks, RVs, and boats. Installation is straightforward – just remove the old terminals, attach your cables to these new clamps (using the included bolts), and tighten them onto the battery posts. Improves electrical connection, which can help with starting and overall electrical performance. Keep a pair in your garage for maintenance day or emergency repairs. A simple upgrade for better reliability.