Quick and Effective: Easily remove damaged, peeled, ed or frozen bolts, nuts, and screws for efficient maintenance tasks. Maximum Gripping Power: The clear female and reverse spiral flutes design ensures gripping power, making removal easier and quicker. Versatile 18-Piece Set: Includes 1 knockout pin, 1 adapter, and 16 screw extractors in various sizes, catering to a wide range of needs. High-Quality Material: Crafted from chrome vanadium steel, providing high hardness for long-term use and reliability. If you have any questions about the product, please feel free to contact us via email.