The occurrence of Levallois tools in the archaeological record is considered to represent an evolutionary hallmark in human technological development, as the predetermined nature of Levallois flake morphology is seen to reflect advancements in the cognition of early hominid toolmakers. A range of subtypes exist within the Levallois group, all of which feature differing preparation methods of the core surface as a means to predetermine the manufacture of distinct flake shapes. While archaeologists devoted much effort to investigate how Levallois core surfaces were prepared, relatively less attention has been paid to other aspects of Levallois reduction, including the ways in which percussive blow was applied to strike off the flake. Previous mechanical knapping experiments have found that the angle at which a hammerstone strikes a core during knapping is influential over flake formation, such that flakes made by different hammer striking angles can vary considerably in their size and sh