The precision screwdriver set is made of S2 steel, which is more advanced than general steel, chrome vanadium steel, alloy steel, precision cast steel, etc. S2 steel has higher hardness, higher torque, and greater abrasion resistance, making it durable. Each screw head is magnetic, so you can easily remove screws in a narrow space, and the screws will be attracted to the screwdriver. Our screwdriver bit set comes with a magnetic handle and 24 interchangeable bits. The different screwdrivers fit most screw heads commonly used in modern electronics manufacturing. The 25-in-1 professional set is easy to use, just select the set you need, turn 180 degrees and pull, unscrew the handle cap, place the bit in the handle, and screw the handle cap back on. Our precision screwdriver kits are designed after years of research and development, which can maximize their use in your projects. Our precision screwdrivers are equipped with an ergonomic non-slip granular rubber handle and a 360° rotating head. Our micro precision screwdrivers are equipped with a storage box made of impact-resistant PP material. The space, placement position, and size of the accessories are reasonably designed, which is convenient for your work. Our screwdriver kit has 24 replaceable precision bits. Whether you are a professional or a hobbyist, this screwdriver kit will meet all your needs and is suitable for repairing desktop and laptop computers, iPhones, MacBook Pros, tablets, etc.