Driven design provides 50X life over standard bits, with a torsion zone built to last, hardened surface and precision tip Precision-milled bit tips deliver a better fit and less cam-out Torsion zone built to last, with a new tapered design, it absorbs the torque peaks of impact drivers to avoid breakage Heat-treated bit manufacturing provides more durable bits Impact-rated interface made to fit 1/4 In hex impact drivers Laser-etched markings lasts for the life of bit, and theyre easier to read Magnetic tips help to hold the screws on the bit