Prehistoric stone tools are tools that were used by humans during the Paleolithic period, which dates from 2.6 million years ago to around 10, 000 years ago. The most common type of prehistoric stone tool is an eolith, which is a tool made from a naturally occurring rock or stone that has been shaped by human hands. Eoliths were used for a variety of tasks, such as cutting, scraping, and hammering. They were also used to make weapons and tools for hunting and gathering.