The results of 80 normed stab-tests in 5 human skulls are reported. The average and maximum depths of penetration in the frontal, temporal, and parietal region at varying thrust momentums (2.6, 4.2, 5.7 kg m/sec; impact velocity nearly 5 m/sec) are shown in a diagram. The plotted resistance-time curves and trajectories are interpreted, using two examples. In a case presented, the thrust momentum necessary to inflict a certain degree of injury (depth of penetration: 80 mm) is estimated to be at least 5.7 kg m/sec. For each individual case, the minimal thrust intensity (momentum) necessary to inflict a certain degree of injury, can be quantitatively determined by test series, using the presented pendulum-stabbing method. The special problems of stab tests are taken in reference.