the centre of the medallion on some specimens and/or the complete disappearance of the convexity of the burr reflect the active part of the hammer reaching exhaustion.The deepest use-wear, often associated with spalls, is generally concentrated at the junction between the medallion and the posterior face of the burr, which experimentally corresponds to the removal of the largest flakes during the first phases of shaping laurel-leaf points, the trimming of the cores, or the removal of the largest blades. However, the distribution of the use-wear traces on the archaeological and experimental samples is not similar, which could indicate different motions, with prehistoric percussion potentially being more tangential.The fact that our experiments were performed by a single knapper makes assessing inter-individual variability impossible (i.e. skill levels, knowledge and mastery of knapping techniques according to the archaeological context, knapper position, prehensile modes for lithic pieces and hammer, knapping motions). These important aspects will be explored in further research.