Features: The electric engraving pen delivers precise grinding for removing oxidation, residues, and old solder from circuit board, ensuring optimal surfaces preparation for flawlessly mobile phone repair and soldering tasks.Featuring adjustable speed settings, ergonomic ABS construction, and low noise operations, this compact tool minimizes hand fatigue while preventing component damage during delicate electronics maintenance.Ideal for professional technicians, DIYer enthusiasts, and mobile repair specialists requiring controlled, detailed work on smartphones, tablets, and small electronic devices.Perfect for workshop environments or home repair stations where quiet, focused motherboard restoration or component refurbishment demands accuracy and safety.Engineered with overheating protective and short circuit prevention, this precise grinding tool combines industrial grade durability with user centric design for reliabled, long lasting performances in intricate electronics projects.Specifications: Component: ABS.Size:Approx. 16x2x2cm/6.29x0.78x0.78inchWeight: 76g.Input voltages: 5V 1A.Maximumly speed: 15000R/min.Battery capacity: 320mAh.Package Includes: 1 Set Electric Grinding Pennote: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order.2.Due to the differences between different monitors, the picture may not reflect the actual color.Thanks for your understandings.