IRWIN 1903521 Bit Set, Steel, 5-Piece

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 excellent 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. Includes two #2SQ/#2SQ, #1SQ/#2SQ, #2SQ/#3SQ and attachment.