Desoldering pump is a handheld tool used to remove molten solder from electronic components and printed circuit boards (PCBs). It’s also called a solder sucker
DHeat the solder joint with a soldering iron until the solder melts.
Position the nozzle of the desoldering pump close to the molten solder.
Trigger the pump (usually by pressing a button or release plunger).
Solder is sucked into the chamber, leaving a cleaner surface.