In case lead-free soldering is used, nitrogen atmosphere is built in a soldering part and oxidization is controlled. *At the above photograph installation of N2 Jacket It can be controlled Oxidization of the soldering tip and solder by building nitrogen atmosphere. By heating nitrogen or air beforehand, the preheating effect is acquired at the time of soldering, and it contributes to the improvement in going up of FILLRET on the spread nature of solder or the back of a PCB. A bridge and Horn decrease the stable disposition top at the time of soldering of very small quantity. It can be attached on our all IRON UNIT with a compact and slim design.