Dewalt dt705435t extreme impact torsion 34 piece set dewalt dt70543t 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 following9x 25mm pozidriv bits pz1 pz2x7 and pz3 5x 25mm phillips bits ph1 ph2x3 and ph32x 25mm torx bits t20 and t