These two Car/Truck Battery Clips are used for gaining power from another car's battery when your battery is power shortage. Lock on to both side and top mounted battery terminals. High-quality electric copper and steel spring can withstand the pressure and maximize the impact. Two Battery Clips are equipped with well-designed and manufactured insulated casing, protective end cap. Color-coded Large Alligator Clips indicates positive & negative. Easy to use with a portable lightweight, safe and reliable characteristics.