Dewalt dt torsion bits pz1234 25mm packs of 520 dewalt dt7219 qz this pack of 20 torsion bits from dewalt are a key addition to any tradesmans toolbox featuring tough quality professional screwdriver bits manufactured with a hardened core for extra strength and durability they have a flexible torsion zone absorbing torque peaks and reducing breakage the design features extra grip ribs that grip the screw and reduce slipping specific bits only dewalt dt7219 qz torsion bits pz3 2