Featuring nylon bristles with excellent wear resistance, these brushes effectively remove stubborn without delicate electronic components or metal interfaces, ensuring both thorough cleaning and protective Suitable for electric grinding pens for meticulous cleaning of phone charging ports, earpieces, and circuit board solder pad in tight spaces Ideal for multiple maintenance scenarios including phone repairs, motherboard cleaning, electronic component removal, and charging port / headphone port maintenance, this 10 piece set meets the high frequency demands of repair shops Allow for easy storage and quick access, making these brushes perfect for workbench organization and improving repair efficiency in professional settings The stainless steel handles provide durability with construction that firmly connects to grinding pens, maintaining stability during fast speed rotation for consistent cleaning extended tool life, Manufacturer: PXZH