867/1 IMP DC Impaktor TORX® bits867 1 IMP DC Impaktor TORX bits Wera 867 1 IMP DC Impaktor TriTorsion Long Service Life Bit, for TORX socket screws. Impaktor bits maximise utilisation of material properties using a very special geometry designed to meet extreme working demands. The combination of a double torsion zone in the Impaktor holder and a torsion zone in the Impaktor bit results in a TriTorsion system. The TriTorsion system is designed to absorb impact forces and thereby