High-precision S2 steel bits: S2 steel bits have excellent processing technology and hardening treatment, and the hardness can reach 60 HRC, which is harder and more durable. The bits are dark red after phosphating treatment and do not rust easily. Wide range of applications: including 56 commonly used bits and sleeves, suitable for disassembly and repair of various smartphones, game consoles, computers, tablets, watches, glasses, etc. Professional accessories: aluminum alloy handle, ergonomic and with magnetism, equipped with extension rods, flexible shafts and an electric drive, suitable for more complex disassembly.< /p> One year quality and service guarantee: If you have any problem or not. If you are not satisfied with the product, please feel free to contact us, we will provide you with a replacement or refund.< /p>Note: The data is all manual measurements. Please allow an error of 1-3cm, due to the difference in light and display, there may be a certain color difference,