The drill bit included in this set is crafted from chromium and vanadium steel, ensuring superior strength and resilience. It has been extensively tested through quality control to guarantee long-term utilization with no damage to iron files or magnetic screwdriver heads. Additionally, this tool boasts a unique magnetic design, which secures small screws and parts in place, making it easy to handle and preventing loss or confusion. The 122-bit Precision Screwdriver Set is easy to use, with a comfortable, rubber handle that enables smooth rotation. Plus, the extension shaft offers 360° flexibility, resulting in greater torque and precision, even in tight spaces. The kit comes with a shockproof plastic storage box that contains all the screwdriver bits neatly organized for easy access and storage. This versatile set can be used for repairing mobile phones, computers, game consoles, sewing machines, cameras, glasses, and any other electronic devices or DIY projects. It is suitable for experts and beginners alike and very easy to handle.