Practical drill bit: for use in hard-to-reach areas. The flexible shaft can be connected to a drill, cordless screwdriver, or hand screwdriver to extend it into hard-to-reach, narrow spaces, allowing for flexible installation work. Multiple size options: This flexible bit extension kit contains two flexible shafts of different lengths: 20 cm and 30 cm. Flexible and extended alloy steel drill bit holder for 1/4" drill bits to reach, remove, and replace hard-to-reach nuts, bolts, and screws in the car. Flexible and flexible drill bit extension: The flexible bit holder bends easily and rotates 360 degrees, allowing you to precisely reach screws in hard-to-reach areas. Ideal for tasks requiring flexibility and precision. High-quality materials: The flexible shaft is made of metal and special chrome vanadium steel, making the drill bit stronger and more wear-resistant, ensuring a longer service life. Wide range of applications: The drill bit extension can be connected to an electric drill, suitable for hand screwdrivers, electric screwdrivers, and pneumatic screwdrivers, making work easier. The drill bit extension is suitable for most general maintenance jobs.