IRWIN Tools 1871087 Impact Performance Series Double-Ended Screwdriver Number-2 Square Power Bit, 6-Inch Built for maximum durability and long life with impact drivers. DoubleLokTechnology ensures both ends of bit lock securely in impact drivers and quick-change chucks, enabling use of two tips from one bit Precision tip geometry delivers superior fitment, reducing stripping and cam-out Power Groove designed for compatibility with IRWIN Impact Performance Series Magnetic Screw-Hold Attachment Manufactured with heavy-duty, cold-forged, high-grade steel to withstand high torque output