Desoldering classical pump, what a pain. It takes 2 hands, must be clever and well-sync. The simple idea: a desoldering pump that melts tin. Hop one hand, the other free, but happiness. A first totally convincing use (the old pump every beast trash direction). Although heat (about 5 minutes) before starting desoldering. Explanation of the fifth missing star: Actually provide a support that is not provided with. Cleaning the inside of the beast (remove tin cold ends) is not super convenient.