1. Easily tell the size through the different colors on top of screwdriver. 2. Exquisite workmanship ensures the super quality and high . 3. Suitable for removing the screws for small devices, such as jewelry, watches, toys, glasses, small devices and other. 4. Special anti-slip handle design, easy to hold and labor-saving. 5. Perfect for repairing watches, spectacle frames and electronic products. 6. Essential supplies for daily use or as special repairing tool set.