Probably temperature control. I just have a caveman soldering iron, but it works for quick things and doesn't have adjustable temp. What I have really enjoyed for the iron is a decent stand/alagator clip setup too.
Probably temperature control. I just have a caveman soldering iron, but it works for quick things and doesn't have adjustable temp. What I have really enjoyed for the iron is a decent stand/alagator clip setup too.