It feels like a consumable item because you have to replace it if it becomes useless due to clogging with solder. If you don't have a spare, your work efficiency will not be good.
(Translated by machine.)

If it becomes a little old after use, the screw part will stick and it will be difficult to remove it when replacing it. The internal heater will be twisted and the heater mounting wiring will be cut, so it will be helpful if the heater is held.
(Translated by machine.)

I was having a hard time working because the things I had been using had deteriorated, but it was saved because the things arrived immediately and I was able to resume work immediately. After all new things have different efficiencies.
(Translated by machine.)