Nitrogen is known in machine soldering, but not yet in hand soldering. Hakko invented this. If you hand-solder with nitrogen, it is much easier than without nitrogen. The soldering tip does not oxidize (closed nitrogen atmosphere), the solder wetting is much easier and you can use a milder flux. The end result (the solder joint) looks significantly better. This is a good solution especially for lead-free hand soldering! With the IPC-7711/7721 training you can choose with which equipment you want to be trained. When you choose Hakko, you can also choose Hakko with / without nitrogen. We will take a nitrogen bottle with us with all the connections for the equipment.