Since 1978 braco electricals manufactures quality cable glands and electrical terminals under brand name " braco". As a part of that bi-metallic pin terminals / lugs are where the solid materials are made by friction welding. This method means that aluminum and copper join through the heat, which develops when aluminum rotates against copper under pressure. This is a superior method to give a complete connection braco bi-metallic connectors are made from aluminum purity equal to or greater than 99.5 %. The barrel is friction welded to the pin thus achieving the best possible transition between the copper pin and aluminum barrel. Barrels are capped and filled with grease so as to avoid oxidization of the aluminum.