Configuration Size: 0.8 1.0 1.2 1.4 1.6 1.8 2.0mm The Hollow needles made of stainless steel, it is not sticking, use the pinhole penetration component pin, heated with a soldering iron, a slight rotation to the component lead and copper foil separation The needle is used for hardware engineer to desolder the Electronic components(e.g. DIP components)from PCB , Because the needle is used with special stainless steel , the needle will not be pasted Flux 8Pcs With case Tips: This product is generally produced material, but economical and practical