Irwin IWAF33SQ1 IRWIN IMPACT DUTY POWER BIT No.1, SQUARE RECESS, 1/4" HEX DRIVE, 4" OAL

These bits are designed with precision tip geometry so they fit fasteners more precisely, which reduces stripping and cam-out. Manufactured with heavy-duty high-grade steel, they'll withstand extremely high torque output, and the black oxide finish resists corrosion and increases the life of the bit. They're designed with a 1/4-inch quick-change shank, so they work with all types of impact and rotary drivers. Plus, they have a unique Power Groove design for use with the exclusive IRWIN Magnetic Screw-Hold Attachment, which prevents fasteners from slipping and wobbling. Long-lasting bits work with all types of impact and rotary drivers. Precision tip geometry reduces stripping and cam-out.