BEST BST-939 Solder Sucker Desoldering Pump Pen 15cm (Golden) Install a proper Suction header on 939 Suction Pen Put the header on IC then press the button on pen to discharge on air then release the button Put the ic to the place you wanna put on,press the button to discharge the air There 3 different size header for different ics;large one can pick 40grams IC,Middle:18gram,Small:3g