Factory Direct: We have more than 16 years of manufacturing experience around the world to provide more consumers with affordable and durable battery cable connectorsSafetyThe end of the jumper cable clamp is covered with a 3-inch removable insulating rubber sleeve to protect the user as much as possible!Size: 6.1 x 4.2 x 0.9 inches - Interface open up to 1.5 inches, The interface opens up to 1.5 inches, The powerful alligator clamp connector is suitable for a variety of battery charger items, All car and truck batteries, solar panels, Camping, Boats, Electric fences, Etc.Meterial: High quality jumper clip made of 100% pure copper, Better conductivity, Minimize transmission loss during connection, Improve work efficiency. The cable clamp is equipped with a high-strength spring to ensure that it will not fall off when working, and you even need two hands to open it!Product Content The package contains two 500-1000A powerful car battery charger clips (2 red and 2 black) and a set of screws and nuts. Red is positive, Black is negative. Input :12V, 38V;