Solder comes in many sizes and compositions depending on the application. For electrical purposes, electrical lead free ...

Perhaps unsurprisingly, most of the length is a hollow tube through which the wires from the three contacts run. These power the ceramic heating element, as well as provide the soldering iron ...

We’ve seen the very patient hand solder wires to BGAs. You can also find more detailed videos and compare other techniques if you want to try them yourself.