A 3D-printed hollow tube has a wire ferrule inserted in the end ... through using an easy motion of the thumb. The solder itself is fed from a spool in a regular bench top holder.

This bonding metal, usually tin and lead, is called "solder." It comes as wire on a spool, heated to its melting point by an electric tool called a soldering iron (or soldering gun). Soldering is ...

[Tom] doesn’t much like breadboarding. He prefers to wire up prototypes with perfboard and solder point-to-point with enameled magnet wire. That may sound troublesome to some of you, but [Tom ...