The CP-3015 Desoldering Wire Solder Wick (Width 3.0mm) is a type of desoldering braid used for removing excess solder from circuit boards or components. The desoldering braid is typically made of fine copper strands and is coated with flux to enhance the absorption of molten solder. The 3.0mm width is designed for use in a wider area, making it suitable for larger solder joints or areas where more solder needs to be removed.