These ZHIDA cross No.2 bits are designed to be compatible with HILTI SMD57 autofeed screw guns, providing a reliable and efficient solution for your fastening needs. Measuring 116MM (approximately 4.57 inches) in length, these durable bits are crafted to withstand heavy-duty applications. The PH2 cross-shaped tip ensures a secure fit and optimal torque transfer, allowing for precise and controlled driving of screws. Whether you're working on construction projects, furniture assembly, or any task that requires a powerful and accurate screw driving solution, these ZHIDA bits offer the performance you can trust. The set includes 3 pieces, ensuring you have a backup on hand for uninterrupted productivity.