DeWalt Extreme Impact Torsion bits withstand the high speed and torque of Impact Drivers, so your bit can keep up with you, even under pressure The magnetic screw lock enables tasks to be completed quicker and easier, reducing instances of dropped or lost screws. DeWalt Extreme Impact Torsion Pozi Bits have a 15° torsion zone that allows the screw driver bit to flex rather than break, and the full fit head prevents rounding of the screw head and prevents 'cam out' (bit head slipping out of the screw head due to the turning force). The magnetic screw lock enables tasks to be completed quicker and easier, reducing instances of dropped or lost screws. This set includes x25 25mm PZ2 Extreme Impact Torsion bits and comes in a Mini ToughCase and DT7701 Magnetic Screw Holder Finger Saver.