141127-2001 1/0 GA 3/8" Stud Fusion MagnaLug® End Lug - These lugs are made 100% copper alloy, tin plated for added conductivity and to resist corrosion with superior reliability for years of dependable service. They are up to 70% stronger than crimp method for a more consistent quality than any other solder method including traditional wire solder & solder slug. They are especially good in presence of destructive vibration or corrosive chemicals.