Safe Material: Our product is made of high-quality tin-plated pure copper. Insulation protection, no exposed metal, directly connected to the battery, power supply to the equipment, safe to use. Size Details: This product includes a pair of battery connectors, which are lightweight. (as shown in the picture) Easy Installation: You just need to tighten the cap to fix it on the battery terminal. When replacing the battery, simply lift the insulating cover and replace the battery, then replace the clip. Safety Protection: The battery terminals are equipped with durable red (+) and black (-) fixed covers, which are easily identifiable and avoid the risk of electric shock. Wide Range of Applications: These battery terminals are very suitable for 12V/24V positive or negative batteries, and can be widely used in cars, vehicles, RVs, and boats, and are suitable for almost all standard round rod size batteries. (As long as the hole size is correct, it can be used)