A method for examining the surfaces and edges of prehistoric tools at different levels of magnification (from the naked eye to an electronic microscope) in order to determine how they were used. Traces can be more or less visible depending on the hardness of the worked material, as well as the strength and speed of the movement applied. Therefore, the point on a projectile may contain significant cracks if it has struck the bone of its prey, while a tool used to soften an animal skin will only show microscopic wear. To interpret the origins of these traces or of more obvious damage, it is necessary to compare them with traces obtained on experimental replicas used for diverse activities, for example, launching projectiles and working animal hides.