Material: carbon steel Packaging: 240pcs Size: Approximately 13 * 6 * 2CM This set contains 240 laptop screws of different specifications and sizes, which is the perfect tool for computer maintenance and is suitable for various types and s of laptops. All screws are carefully placed in a portable plastic box for easy classification, storage and carrying, which is very convenient whether you are at home or on the road for maintenance. It is very suitable for beginners and professionals. Without professional skills, only a screwdriver is needed to easily complete the maintenance and installation tasks of computers. It can be used not only for notebook computers, but also for mobile phones, tablets and other electronic devices. In addition, it is also a perfect gift for DIY enthusiasts or computer maintenance professionals. Note: Due to manual measurement, please allow an error of 1-3mm. Please ensure that you do not mind before bidding. Due to the differences between different monitors, the images may not reflect the actual color of the item. Please refer to the actual image received. Thank you very much. _x000D_ _x000D_