High-quality material: The screwdriver is made of S2 steel, which is more durable than CR-V steel. With a hardness of HRC (60-65), they are less prone to deformation and breakage. Professional tool kit: The tool kit has a recessed position. If the screws are deep and clean, they can be easily removed. It also comes with a special screwdriver to prevent rust and breakage and is suitable for low-speed drills. Complete tool kit: This precision screwdriver set includes 115 precision screws and 20 necessary disassembly accessories. Each drill bit is unique and different. Use the magnetic screw plates to catch screws and effectively protect them from falling out. Versatile: The 135-in-1 precision screwdriver set can be used to repair electronic devices such as mobile phones, laptops, etc., laptops and cameras, as well as household appliances such as TVs, air conditioners, refrigerators and cars. This is the perfect repair kit for adjusting and repairing glasses and watches. All tools are stored in a storage box for easy transport. Tools do not come loose easily. This screwdriver set is an ideal gift for friends and family.