Doublelok technology ensures both ends of bit lock securely in impact drivers and quick-change chucks, enabling use of two tips from one bit for added convenience and extended life. 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. t25/#2sq. 2-3/8" overall length.