Does one tool work best in every application? A hammer can pound any nail in the house, but a pneumatic nail gun gets the roof shingled faster. For the HVACR technician, the right tool for soldering ...

In the 1800s and early 1900s soldering irons were still heated by flame. The large copper tips on the irons were slow to heat and would at best store heat for only a few minutes. It was not uncommon ...