Alpha Metals Rosin Core Solder Wire is the most effective way to solder! This rosin solder wire is 0.062-inch in diameter with an electrical melting point of 376 degrees Fahrenheit. The solder wire has a unique rosin flux that combines the best properties of its two key ingredients, tin and lead. This Alpha Metals solder wire is perfect for low-temperature soldering and bridging on both circuit boards and live electronics with a higher tin content. Whether you're building a robot or just need to clean up some old electronics, this spool can help you with the best solder at the best price.