It comes with a length of the alloy, and a syringe of the best solder flux I have ever used. I apply some flux, and then use a solder sucker or wick to get most of the original solder off. I then apply a bit more flux and the Chipquik alloy to blend with the solder there. Heat all the points up and pull the item out. The alloy stays melted for a long time, and makes pulling parts way easier. If you use this on caps, you will never damage anything. When I get the item out, I go back with some flux and wick to get the Chipquik out of there. Then a bit of lacquer thinner with a Q-tip and the location looks factory fresh.
Look at the results I had below removing the gain and bass pots off of an M50...