Dewalt dt705435t extreme impact torsion 34 piece set dewalt dt70545t qz this extreme impact torsion set from dewalt are specially designed to have an increased life while the optimised torsion zone allows the bit to flex rather than break even when used in extreme applications the contoured area of the tip flexes with the torque of the impact driver contains the following5x 25mm pozidriv bits pz1 pz2x3 and pz33x 25mm phillips bits ph1 ph2 and ph316x 50mm pozidriv bits pz1x3 a