Description 1Made of selected chromium vanadium alloy steel, 48-52HRC high hardness wear resistance long service life. 2Fine workmanship ensures stable performance and high accuracy. 3Smooth surface offers a comfortable grip and nice appearance. 4Strong magnetic adsorption, quick installation and disassembly, convenient and efficient operation. 598 bits optional for meeting different requirements and easy to remove all kinds of screws, such as cross screw, regular triangle screw, H - type screw, Pentagon screw, slotted screw, Y - type screw, hexagon screw, inner - hexagon screw, etc. 6Equipped with a High quality storage box to prevent tools from moisture and oxidation, convenient for carrying and storage. 7A practical toolbox for the maintenance of a variety of electronic equipment, such as mobile phones, cameras, glasses, tablets, desktop computers, televisions, keyboards, small household appliances, laptops, quartz watches, etc., meeting most of the daily needs.