carbon steel, stable and not easy to break, safe and, not easy to wear Not only suitable for watch repair, glasses repair, jewelry work, but also for the installation and removal of various miniature screw buckles Contains 13 screwdrivers, 8 of which are flat-blade screwdrivers of different sizes, 0.6 / 0.8 / 1.0 / 1.2 / 1.4 / 1.6 / 1.8 / 2.0mm and 5 crossing for head screwdrivers of different sizes, namely, 1.2 / 1.4 / 1.6 / 1.8 / 2.0mm Has a design, which makes it very suitable for repair work of various small objects The size can be quickly identified from the appearance, and you can easily operate the screwdriver, Manufacturer: CRFFZ