3-1/2 in. Phillips #1 SHOCKWAVE Impact Duty Power Bit (5 pk)Mfr #: 48 32 4565 IMPACT RATED: These are designed to take the punishment that high torque impact drivers dish out on a daily basis FORGED TIPS are built to maximize their grip with your fastener PROPRIETARY STEEL ALLOY keeps these bits in shape up to 30 times longer than competing high impact bits FLEXION: The section between the bit head and the hex shank can flex, reducing the stress of high torque operations, improving its longevity