1. [Precision Screwdriver Set] This 145 in 1 Precision mechanic screwdriver contains a handle, 120 bits, 12 sleeves, and auxiliary tools such as opening picks, tweezer, suction cup, magnetizer, and flexible extension shaft. You can easily repair or disassemble all types of devices such as watches, mobile phones, cameras, game console, tablet, PC, glasses. It is an indispensable tool for DIY enthusiasts and professionals. 2. [High-Quality] Screwdriver Set bits are made of high-quality CRV and S2 steel, and have undergone special mechanical processing and strict surface treatment, exhibiting excellent precision, hardness, corrosion resistance and durability. The laser engraving on the bits ensures clear identification and prevents ink flaking. The storage box is sturdy and shockproof to protect the bits. All sizes of drill bits have undergone rigorous quality control testing to make sure stable and not easily damaged, guaranteeing long-term use. 3. [Ergonomic design] Ergonomic and 3D non-slip texture handle, comfortable to grip, effective execution, even if used for a long time without any discomfort. The handle rotating cap design can not only reduce friction with the palm, improve usability and efficiency, but also rotate the cap to reduce boredom. 4. [Flexibility in use] The layout design of the parts is reasonable and clear, easy to assemble and access. Parts can be ly matched according to different scene requirements. Interchangeable precise manual tool set is equipped with a hard extension shaft and a flexible extension shaft which is easy to be extended to a narrow place where the handle cannot enter.