This tool is a must for certain solder jobs, particularly when the item being removed has more than one leg welded in solder. So all you have to do is melt the solder holding each leg and using this tool which has a suction action to suck up the solder while its melted, thereby freeing a unit which otherwise may cause grief from not being able to simultaneously apply heating in time to free the afore-mentioned unit....also preventing damage to the unit from excessive heating from the soldering iron.
From my experience, irons are most useful for taking the creases out of your clothes. Turn it on, wait for it to heat up then run the iron across the creased material. Great for business-shirts and T-shirts. Minors should as Mum to help them with the ironing :)
Gee! touchy. I was having a joke at your comment re minors. Unfortunately my Mother passed away some time ago, but luckily I don't dribble. I have used a desoldering tool for many years though, in fact this exact design must be over 20 years old. Maybe a bit before your time :-) Ask Mummy to get you a sucker, just be sure to keep it clean. They tend to clog up with dross very quickly. Also use a very small amount of very light grease on the O-ring to give more suction, use a small piece of rag to pull through the barrel to keep it clean and never let the tip actually touch the soldering iron, heat the solder joint, quickly remove the iron and immediately suck (the solder joint, not your thumb :-) It takes practice but after a 25 years it gets easy. Prior to using this method I used the solder wick which I see HK is selling as well. Another secret, if the joint is hard to remove it can help if your resolder it then try again.