1 Pair Car Battery Terminals 12V Auto Battery Terminal Connector Battery Bornes Cable Terminal Adapter Copper Clamps Clip Screw The terminals themselves are made of brass, and the fasteners are made of stainless steel to provide maximum waterproof and battery acid protection, while providing the electrical connections required to operate electronic devices.TIGHTEN IT NORMALLY, IT WON'T FALL OFF EASILY! FEATURES:1. The battery terminal connector is made of brass. Better corrosion resistance.2. Us